3.4. Settings of the engine and description of the main procedures of its service
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Implementation of the listed below procedures will require the following special tools:
- Kompressometr;
- Tachometer and stroboscope;
- Duration measuring instrument (on a corner) the closed condition of contacts of the breaker of the distributor (for models of 4.2 l).
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Service of the air cleaner
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The air cleaner is equipped with the paper filtering element. Check of a state and cleaning of an element has to be made according to the schedule of routine maintenance given above, but at least through each 3000 km on models of 4.2 l (see an accompanying illustration) and 5000 km on models of 3.0 l. |
Replacement of an element of the air cleaner is recommended to be carried out at least through each 40000 km of a run. At the same time the interval has to be respectively reduced if the car is operated in intense conditions.
Before getting to the air cleaner the soaked-up air there passes through preliminary a pyleotdelitel of cyclonic type where it twists therefore the most part of dust is besieged on separator walls. The accumulated dust should be deleted periodically by tightening of a rubber cover in the form of a duck beak in the lower part of the case of a pyleotdelitel.
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Pour in the paper filtering elements are not subject to washing with gasoline or any other solvent. At treatment of an element fuel or oil it has to be replaced with new.
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- Give one or several (depending on an air cleaner design) nuts lambs of fastening of the top cover of the air cleaner, remove a washer(s). Release the remained clips, uncover and take the filtering element from the main case of the air cleaner.
- Wipe a cover and the case of the air cleaner from within, having carefully cleared them of dust and oil deposits. At the same time try not to allow hits of foreign objects and other garbage in a carburetor mouth
- Check a condition of an element, in case of need replace it. You make installation upside-down. At the same time pay attention to the next moments:
- The element has to be established strictly on the center of the main case of the air cleaner;
- Before tightening nuts lambs, record the top cover clips;
- At first tighten nuts lambs only before introduction them in contact with a cover surface, then hold on them on three turns.
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The models of 4.2 l of late years of release equipped with system of injection of fuel (EFI)
In the air cleaner of the models equipped with the EFI system the filtering element which does not need periodic cleaning between replacements is established viscous.
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Replacement of such filtering element is made through each 40 000 km of a run (see an accompanying illustration), and this interval should be considered only approximate as in case of operation of the car in intense conditions. |
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- Disconnect a negative wire from the battery.
- Disunite the electric socket of the measuring instrument of an air stream, disconnect vacuum hoses from the measuring instrument.
- Release clips of fastening of the top part of a casing of the air cleaner to lower.
- Raise the top half of a casing and take the filtering element. You make installation upside-down taking into account the next moments:
- Before assembly of the air cleaner carefully wipe both half of its casing from within and outside of the rags moistened in oil, watching that the garbage did not get to the measuring instrument of an air stream.
- Track correctness of installation of an element in the top half of a casing of the air cleaner.
- Track reliability of connection of an electrical wiring to the measuring instrument of an air stream.
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Check of a state and replacement of the fuel filter
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In a motive compartment examine the fuel filter on existence of signs of hit in it of dirt and water (on an accompanying illustration the arrangement of the fuel filter on models of 3.0 l is shown). In case of identification of those or if the term of planned change of the filter approached, start its replacement. |
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- Take the filter from an assembly collar and press a clip near the filter the hose going from the fuel tank. When tightening a clip try not to damage a hose.
- Establish drain capacity under the filter. Release hose collars, disconnect the filter from the fuel line and merge the fuel remains from hoses in the prepared capacity.
- Put on hoses the corresponding unions of the new filter and tighten collars.
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At turning on of the filter in the line track that the arrow on its case specified in the direction of a stream of fuel.
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- Remove a clip from a fuel pipe and install the filter in an assembly collar.
- Start the engine and check the installed filter for existence of signs of leak of fuel.
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The models of 4.2 l of late years of release equipped with system of injection of fuel (EFI)
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- Dump pressure in a power supply system for what:
- Give screws and lift the relay panel located in a motive compartment located in the neighbourhood with the battery. Uncover and take a safety lock of the fuel pump on 15 A (see an accompanying illustration);
- Start the engine and let's it work on single turns to a spontaneous stop. For a guarantee of completeness of dumping of pressure include a starter for 10 seconds;
- Switch off ignition.
- Disconnect a negative wire from the battery.
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- Find in a motive compartment the fuel filter (see an accompanying illustration) and establish under it the drain capacity made of BMS-material and weaken fastening collars on the filter of fuel hoses.
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- Disconnect hoses from the filter and remove the filter, having remembered its adjusting direction.
- Install the new filter, having correctly deployed it in relation to the direction of a stream of fuel. Check a condition of fuel hoses, in case of need make replacement.
- Connect hoses to the filter and reliably tighten collars of their fastening.
- Establish into place a safety lock of the fuel pump and start the engine. Check the filter for existence of signs of leak of fuel.
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Adjustment of a tension of driving belts
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The correct adjustment of effort of a tension of driving belts allows to avoid their slipping, at the same time without overloading bearings of the served units that is especially important in case of the generator and the water pump. |
Схемв laying of driving belts on models with the engine of 3.0 l
Laying of belts on the engine of 4.2 l
Ventilatory belt (belts)
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- Press on a ventilatory belt (belts) on the site in the middle between pulleys of the generator and water pump with effort 98 N (effort of a thumb). The required deflection of a belt makes 4 ÷ 8 mm for models of 3.0 l and 13 ÷ 15 mm for models of 4.2 l.
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Surely you make replacement of belts on models of 4.2 l in a set. |
- In case of need weaken a lock bolt of the generator and rotation of an adjusting bolt achieve the required effort of a tension of a belt (in deflection size).
- Tighten a lock bolt of the generator, start the engine approximately for five minutes and again check correctness of a tension of a belt.
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Driving belt of the steering pump
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- Press on a driving belt on the site in the middle between pulleys of the steering pump and a bent shaft with effort 98 N (effort of a thumb). The required deflection of a belt makes 11 ÷ 15 mm for models of 3.0 l and 15 ÷ 17 mm for models of 4.2 l.
- In case of need weaken a lock bolt of the steering pump and rotation of an adjusting bolt achieve the correct effort of a tension of a belt (in deflection size).
- Tighten a lock bolt of the steering pump, start the engine approximately for five minutes and repeat check of a tension of a belt.
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Driving compressor belt of the conditioner of air
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- Press a belt on the site in the middle between pulleys of the compressor of the conditioner and a bent shaft with effort of 98 N (effort of a thumb). The required deflection of a belt makes 6 ÷ 10 mm for models of 3.0 l and 8 ÷ 10 mm for models of 4.2 l.
- In case of need weaken a clamping nut in the center of a tension roller and rotation of an adjusting bolt achieve the correct effort of a tension of a belt (in deflection size).
- Tighten a lock nut of a tension roller, start the engine approximately for five minutes and repeat check of a tension of a belt.
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Care of high-voltage wires
For the purpose of suppression of a radio noise of VV of a wire, laid between candles and a cover of the distributor of ignition, and also between the central plug of a cover of the distributor and the coil of ignition are equipped instead of a copper conducting vein with the coal core. Such core easily breaks therefore it is not necessary to bend excessively wires and at a detachment from spark plugs to pull only for a tip, and not for a wire at all. It is necessary to be careful as well at connection of wires. Perelamyvaniye of the VV core of a wire can become the reason of admissions of ignition in the engine.
Check all VV of a wire for existence of outer defects of isolation (attritions and cracks), in case of need make replacement. You should not undertake attempts of repair of the damaged wire at all. Before check of a wire it is necessary to clear, having wiped with the rags moistened in kerosene, then to dry carefully.
Measurement of resistive resistance of VV of wires
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If the ohmmeter is available, measurement of resistive resistance of VV of wires can be performed. |
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- Having uncovered the distributor together with the wires connected to it by VV, begin to measure serially resistance of each of wires, connecting ohmmeter probes to a candle tip of a wire and the corresponding plug in a distributor cover (see an accompanying illustration). Resistance should not exceed 30 kOhm.
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- If the result of measurement exceeds value 30 kOhm, disconnect the corresponding wire from a cover of the distributor and repeat measurement already separately for a wire. If the result is confirmed, the wire is subject to replacement.
- The increased resistance in a cover of the distributor can is connected with oxidation of its plugs. In this case traces of corrosion have to be removed from plugs by means of a suitable scraper of the small size or an emery paper.
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Also examine a distributor cover from within and outside on existence in it of cracks and coal paths between VV plugs. At detection of similar defects the cover should be replaced.
Check also a condition of a coal brush in the central part of a cover of the distributor. in case of identification of traces of formation of an electric arch and other damages make replacement. |
Check of a state and service of spark plugs
Check of a state, cleaning and installation of interelectrode gaps of spark plugs should be made regularly, according to the schedule of routine maintenance of the car, through each 20 000 km of a run.
Before removal of candles make sure of purity of candle niches in order to avoid hit in cylinders of foreign objects and small garbage. In case of need wipe niches or an obduyta with their air, having used the ordinary bicycle pump for this purpose.
Working part of the candles removed from the engine which is in a working mechanical order has to be covered with an easy powdery raid from light brown till gray-golden color. After performance of service signs of wear and a normal obgoraniye of electrodes can be shown.
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Existence on a working part of candles of a thick layer of oil deposits of black color (see an accompanying illustration) demonstrates to the excessive consumption of oil caused by a bad mechanical condition of the engine or that candles with excessively low kalilny number are used. |
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At an erosion of electrodes the candle should be counted up to the degree shown on an accompanying illustration worn-out and it is necessary to replace on new, suitable type. |
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Existence on a working part of deposits of white or yellowish color speaks about excessive addiction of the driver to the bystry driving which is followed by engine overheats or about application of candles with excessively high kalilny number, in particular when it is followed by cracks of the porcelain insulator and an obgoraniye of electrodes (see an accompanying illustration). |
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Before installation of spark plugs on the engine make check of interelectrode gaps by means of the special measuring probe of wire type (see an accompanying illustration). as a last resort it is possible to use the probe of lezviyny type. In case of need corrections of a gap turn in appropriately side electrode by means of adaptation which is built in the measuring probe.
Screw candles manually in a head of cylinders, then by means of a dynamometer key tighten them with the required effort. |
At correction of gaps and a vvorachivaniya of candles be careful - on an accompanying illustration the section of a working part of a candle illustrating defect of the insulator of the central electrode in the form of cracks which are usually formed when applying excessive efforts during adjustment of an interelectrode gap is shown. The distortion of a candle key when tightening a candle appears the cause of cracks in the insulator of a shaft of a candle more often.
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If the dynamometer key is not had near at hand, candles should be tightened with extra care as pulling is fraught with failure of a carving in landing openings in a body of the head of cylinders made of soft aluminum alloy. Will be after tightening of candles to tighten manually them on 1/4 turns the special candle key equipped with a soft insert enough. |
Adjustment of gaps of valves (model of 4.2 l)
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The 3.0 l engines are equipped with hydraulic pushers and do not need regular correction of valvate gaps. On models of 4.2 l adjustment of valves should be made according to the schedule of routine maintenance of the car. |
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- Start the engine and warm up it up to the normal working temperature.
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If adjustment of valves is made after performance of service of a head of cylinders or yokes, initial installation should be made on the cold engine. |
- Remove the air inlet sleeve laid between the air cleaner and a cyclonic pyleotdelitel of preliminary cleaning. In order to avoid hit of dirt in the engine wipe with suitable solvent a joint of a cover of a head of cylinders with the head case.
- Disconnect hoses of ventilation of the engine, give fixing bolts and uncover a head of cylinders.
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- Turning the engine in the normal direction (see the Section the General information at the beginning of the Head), bring the piston of the first cylinder into the provision of VMT of the end of a step of compression. At the same time the distributive tag on a pulley of a bent shaft has to be combined with a zero tag on a cover of the drive of the gas-distributing mechanism (see an accompanying illustration), and two valves of the sixth cylinder - to reach positions of overlapping: one, directly preceding closing, the second - to opening.
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- By means of an edge of 0.38 mm of the measuring probe estimate a gap between an end face of a core of the inlet valve of the first cylinder and a working surface of its yoke (see an accompanying illustration). The edge has to with an easy resistance pass through a gap.
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- In case of need adjustments weaken a lock-nut of the adjusting screw of a yoke and rotate the screw, achieving the required result. Having fixed the screw in the chosen situation, tighten a lock-nut. Once again repeat check of a gap the probe after tightening of a lock-nut.
- Working similarly, check and modify gaps of the following valves: final first, third and fifth cylinders, inlet second and fourth cylinders.
- Turn a bent shaft on one whole revolution in the direction of normal rotation so that the piston of the sixth cylinder moved to the provision of VMT of the end of a step of compression. The position of overlapping stated above will be reached respectively valves of the first cylinder.
- Now execute check and correction of gaps of final valves of the second, fourth and sixth cylinders and inlet - the third, fifth and sixth.
- Establish into place a cover of a head of cylinders, having replaced if necessary sealing laying, and an air inlet sleeve.
- Start the engine and check a cover of a head of cylinders for existence of signs of leaks. At identification of those remove the cause.
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Check of compression pressure
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- Disconnect wire VV from spark plugs.
- Clear candle niches of dirt and garbage. Turn out candles.
- Disunite the electric socket on the carburetor for prevention of operation of the electromagnetic valve of interruption in supply of fuel.
- On models of 3.0 l disunite the electric socket of the distributor for the purpose of a de-energization of system of ignition.
- On models of 4.2 l for a de-energization of system of ignition disconnect a positive wire from the coil. Insulate a wire tip an adhesive tape for the purpose of prevention of casual short circuit.
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- Establish компрессометр in a nest of a spark plug of the first cylinder (see an accompanying illustration) (follow instructions of the manufacturer of the device).
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- Ask the assistant to open completely a butterfly valve and to turn the engine a starter. After reading of the maximum indication of the measuring instrument (usually that is reached on the third or fourth turn of the engine) the starter can be switched off.
- Write down result and repeat check for the remained cylinders.
- Compare among themselves all taken readings (the required values and an admissible difference between cylinders are given in size tables and adjustments at the end of the Management).
- If compression pressure in one or several cylinders is underestimated, make the following additional check:
- Pour in a small amount of motive oil in the corresponding candle opening(s), for uniformity of distribution of oil in the cylinder(s) turn the engine.
- Repeat check of compression pressure for this cylinder(s).
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Essential increase of compression pressure after filling in the cylinder of oil is a sign of wear or damage of piston rings, the piston or a mirror of the cylinder.
Lack of any noticeable changes in indications can be considered as a sign of jamming, a burn-out, or damage of valves or violation of tightness of laying of a head of cylinders.
The models of 4.2 l of late years of release equipped with system of injection of fuel (EFI)
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- Start the engine and warm up it up to the normal working temperature. Switch off ignition.
- Dump pressure in a power supply system.
- Remove the filtering element of the air cleaner and a spark plug.
- Disconnect VV an ignition coil wire from a cover of the distributor and ground it on weight.
- Establish компрессометр in a candle opening of the first cylinder (follow instructions of the manufacturer of the device).
- Ask the assistant to open completely a butterfly valve and to turn the engine a starter until the maximum instrument reading is reached (it appears three-four turns usually enough).
- Write down the indication and repeat check for the remained cylinders.
- Compare among themselves all taken readings (the required values and an admissible difference between cylinders are given in size tables and adjustments at the end of the Management).
- If compression pressure in one or several cylinders is underestimated, make the following additional check:
- Pour in a small amount of motive oil in the corresponding candle opening(s), for uniformity of distribution of oil in the cylinder(s) turn the engine.
- Repeat check of compression pressure for this cylinder(s).
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Essential increase of compression pressure after filling in the cylinder of oil is a sign of wear or damage of piston rings, the piston or a mirror of the cylinder.
Lack of any noticeable changes in indications can be considered as a sign of jamming, a burn-out, or damage of valves or violation of tightness of laying of a head of cylinders.
Service of the distributor of ignition
On the Patrol/Maverick series cars described in this manual one of two types of distributors is established. In models of 3.0 l the electronic distributor of ignition is used, on model of 4.2 l the distributor with the breaker of contacts is installed.
Distributors are equipped with the special block which is limiting the maximum turns with value 5000 ÷ 5400 in a minute and received respectively the name of the limiter of turns. The block consists of the sprung rotor button and a special cover which on reaching turns of the engine of critical value disconnect all spark plugs, except candles of the second and fifth cylinders.
Distributors with the contact breaker are equipped with replaceable contacts and the condenser and need regular service, greasing of a cam and the mechanism of the proofreader of an advancing of ignition, and also cleaning of internal surfaces and components of a cover.
The electronic system of ignition does not need service, except periodic cleaning and check of a condition of a cover and the rotor button of the distributor, and also lubricant of the centrifugal mechanism of correction of an advancing of ignition.
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During the work with components of electronic system of ignition or near them it is necessary to observe special precautionary measures in order to avoid getting injured as a result of an electroshock. Remember that at secondary contours of such systems there is dangerously high voltage.
Before a rassoyedineniye and connection of electric sockets it is necessary to switch off ignition (a key - in position of OFF) in order to avoid damage of components of system of ignition, or receiving an electroshock.
Before starting any adjustments of installation of a corner of an advancing of ignition make sure of serviceability of functioning of the centrifugal mechanism of correction of an advancing of ignition in the distributor. |
Replacement of contacts of the breaker
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- Uncover the distributor, give a bolt of fastening of the runner.
- Remove the runner.
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- Weaken the screw of contact and disconnect NV a wire from the insulating block on contacts (see an accompanying illustration).
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- Weaken approximately on two-three turns screws of fastening of a plate of the fixed contact. Completely it is necessary to unscrew screws only at special need.
- Remove assembly of contacts of the breaker from the fixing screw and take contacts from the distributor.
- Disunite the electric socket of the distributor.
- Give clamping the screw of a clamp of NV of a wire and the screw of the plug of a wire of grounding on the distributor case. Turn out the fastening screw on the condenser case, remove assembly of the condenser from NV a wire and you will throw out it.
- You make installation of contacts upside-down.
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New contacts of the breaker have to be washed carefully out before installation in solvent for the purpose of removal from them an anticorrosive covering. |
- Install the condenser on the distributor and tighten the screw of its fastening. Track correctness of laying of NV of a wire.
- Fill a little high-temperature lubricant under a heel of the rubbing block of contacts of the breaker, apply a little lubricant also on working ledges of cam assembly.
- Establish new contact assembly in a plate of the basis of the breaker and temporarily tighten fixing screws, having tracked correctness of installation of a wire of grounding.
- Turn the engine so that the rubbing block of mobile contact appeared on a cam ledge.
- Slightly weaken screws of fastening of motionless contact by means of the suitable screw-driver and shift a plate of contacts in the required direction, trying to obtain a gap at 0:45 ÷ of 0.55 mm between contacts (use the probe of lezviyny type - the edge of the corresponding thickness has to pass in a gap with an easy resistance). Upon completion of correction of a gap tighten screws of fastening of a plate.
- Several times turn the engine and repeat measurement.
- Connect NV a breaker wire to the insulator block on a wall of the distributor and install into place the screen of the limiter of turns, the runner and a cover of the distributor.
- According to instructions of manufacturers connect the measuring instrument of duration of the closed condition of contacts of the distributor, a tachometer and a stroboscope to the engine and check installations of turns of idling, duration of the closed condition of contacts and a corner of an advancing of ignition.
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The models of 4.2 l of late years of release equipped with system of injection of fuel (EFI)
The electronic system practically does not need service, though it is recommended to make periodically removal, cleaning and check of a condition of a cover of the distributor.
Absolutely wipe a distributor cover with soft rags and carefully examine it from within and outside on existence of cracks. At detection of cracks, signs of an excessive obgoraniye of plugs or wear of a coal brush replace a cover with the rotor button.
The order of removal, check of a state and installation of the distributor is described in the Section devoted to systems of injection of fuel and engine management in the Head of the Power supply system and production of the fulfilled gases.
Rules of connection of the diagnostic equipment
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Some of tachometers, stroboscopes and analyzers of parameters of ignition of old type do not suit for application in systems of electronic ignition. Before starting performance of checks make sure of the validity of the diagnostic equipment which is available at your disposal.
Do not allow casual grounding of a wire of a tachometer on weight in order to avoid failure of the measuring equipment or components of system of ignition. |
Stroboscope
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Connect a stroboscope to a wire of a spark plug of the first cylinder (follow instructions of the manufacturer). The order of numbering of cylinders and the direction of rotation of the distributor of the engine of 4.2 l are shown on an accompanying illustration. |
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Do not disconnect a stroboscope with a power supply from the car battery at the working engine at all, so the power surge can lead to failure of the generator.
Do not allow disconnection of VV of wires in order to avoid damage of components of system of ignition. |
Tachometer
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- Make sure that the available tachometer is suitable for check of system of ignition of your car.
- In systems with the breaker of contacts connect the alarm probe of a tachometer to the negative plug of the coil of ignition. You make further connections according to instructions of the manufacturer of the device.
- In the systems with electronic ignition equipped with the special socket for connection of a tachometer connect the alarm probe of the device to this socket. You make further connections according to instructions of the manufacturer of the device.
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Duration measuring instrument (on a corner) the closed condition of contacts of the breaker
It is possible to check duration of the closed condition of contacts of the breaker only with use of this device. On models with electronic ignition this parameter is not subject to adjustment.
Connect the alarm probe of the device to the negative plug of the coil of ignition. You make further connections according to instructions of the manufacturer of the device.
Adjustment of duration of the closed condition of contacts of the breaker and installation of a corner of an advancing of ignition on models of 4.2 l
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- According to the recommendations stated above connect a tachometer, the measuring instrument of duration of the closed condition of contacts of the breaker and a stroboscope to the engine. Start the engine and warm up it up to the normal working temperature.
- By means of the adjusting screw expose turns of idling of the engine according to standard requirements (see size tables and adjustments at the end of the Management).
- Check duration of the closed condition of contacts of the breaker (see size tables and adjustments at the end of the Management), in case of need make adjustment - for reduction of duration increase a gap in contacts and vice versa. For performance of this check the engine has to be stopped, and the cover, a rotor and the screen of the limiter of turns of the distributor are removed.
- Upon completion of adjustment of duration of the closed condition of contacts of the breaker transfer transmission to situation "N" or "P" (AT) and begin to vary engine turns ranging from single till 2000 a minute, watching the measuring instrument indicator. If noticeable changes in instrument readings take place, check a distributor shaft for existence of an excessive side side play, estimate degree of wear of a cam and check a condition of contacts of the breaker. Replace defective components.
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After completion of the procedures of replacement and/or adjustment of contacts of the breaker it is necessary to check installation of a corner of an advancing of ignition surely. At correction of a corner of an advancing of ignition there is no need for a detachment of vacuum hoses of the distributor. |
- For check of installation of a corner of an advancing of ignition start the engine and warm up it up to the normal working temperature and leave working at single turns which have to conform to standard requirements (see size tables and adjustments at the end of the Management).
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On models with AT check of installation and adjustment of a corner of an advancing of ignition have to be made at the lever of the selector of transfers transferred to situation "D". At the same time it is impossible to allow at all opening of a butterfly valve as the car can move out from the place. Do not forget to check reliability of raising of the parking brake. |
- Having included a stroboscope, make sure that the tag on a pulley of a bent shaft is opposite to a mark 10 ° on a scale on a cover of the drive of the gas-distributing mechanism.
- In case of need modify installation, having weakened a fixing bolt and having as appropriate turned the distributor.
- After completion of adjustment tighten a bolt of fastening of the distributor and, in case of need, modify turns of idling of the engine. On models with AT track that transmission was transferred back to situation "P".
- For check of serviceability of functioning of the mechanism of correction of an advancing of ignition:
- Disconnect a vacuum hose from the distributor;
- Gradually increase engine pace, watching the shift of the distributive tags highlighted by a stroboscope; if the proofreader functions regularly, the moment of ignition has to be displaced in process of increase in turns towards an advancing, otherwise uncover the distributor and turn the runner in the direction of normal rotation - at an otpuskaniye it has to return to a starting position;
- Keeping the frequency of rotation of the engine of equal about 2000 rpm, carefully connect a vacuum hose to the distributor. At correct functioning of the vacuum proofreader the moment of ignition has to move towards an advancing. In case of need make replacement of components.
- Kill the engine and disconnect the diagnostic equipment.
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Adjustment of installation of a corner of an advancing of ignition on models of 3.0 l
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- Connect a tachometer and a stroboscope to the engine. Start the engine and warm up it up to the normal working temperature.
- Disconnect a vacuum hose from the distributor and its zakuporta.
- Adjust turns of idling of the engine according to standard requirements (see size tables and adjustments at the end of the Management).
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- Highlighting a stroboscope, make sure that the index on a cover of the drive of the gas-distributing mechanism is combined with a point on the scale of a pulley of a bent shaft corresponding 3 ° (the price of one division of a scale makes 5 ° - see an accompanying illustration).
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- In case of need make correction of installation of a corner of an advancing of ignition, having weakened a fixing bolt and as appropriate turning the distributor case.
- Upon completion of adjustment tighten a bolt of fastening of the distributor and, in case of need, modify idling turns.
- Connect a vacuum hose to the distributor and, using a stroboscope, make sure of index shift in a point on a pulley scale, corresponding 15 °. If such shift does not occur, then or passability of a vacuum hose is broken, or the vacuum proofreader's block is faulty.
- Kill the engine and disconnect the diagnostic equipment.
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Adjustment of turns and quality of mix of idling
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The procedure of adjustment of quality of air-fuel mix of idling described below can be perceived only as temporary adjust. Final installation has to be made by the specialist of dealer office of the manufacturing company of the car with application of a gas analyzer. |
Before starting performance of adjustment of turns and qualities of mix of idling make sure that the following conditions are met:
- The filtering element of the air cleaner is not polluted and established;
- The engine is heated-up up to the normal working temperature;
- The corner of an advancing of ignition and interelectrode gaps of candles are exposed correctly;
- All onboard consumers of the electric power are switched off;
- All vacuum hoses are correctly connected and reliably fixed on the unions;
- Fuel level in the float-operated camera of the carburetor conforms to standard requirements;
- The air gate is completely open.
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- Connect a reliable tachometer to the engine. Start the engine and warm up it up to the normal working temperature.
- Several times lift engine turns to 2 000 ÷ 3 000 a minute, dumping them then back to single.
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Models of 3.0 l
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- Completely screw the screw of adjustment of quality of mix to an easy emphasis in a saddle. Turn out the screw back approximately on four turns. During adjustment of quality of mix the probability of a stop of the engine is not excluded.
- Adjust position of the persistent screw of a butterfly valve, trying to obtain idling turns in 800 ± 50 in a minute.
- Rotation of the screw of quality of mix achieve stable operation of the engine with the maximum turns.
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Models of 4.2 l
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- On models from AT transfer the selector lever to situation "D" and firmly cock the parking brake.
- The arrangement of adjusting screws on the carburetor of the engine of 4.2 l is shown on an accompanying illustration.
- Establish by rotation of the persistent screw of a butterfly valve single turns of the engine 650 ± 50 in a minute.
- Completely screw the screw of adjustment of quality of mix to an easy emphasis in a saddle. Turn out the screw back approximately on four turns. During adjustment of quality of mix the probability of a stop of the engine is not excluded.
- Again modify idling turns, rotating the adjusting screw.
- Rotation of the screw of quality of mix achieve stable operation of the engine on the maximum turns, then turn the screw on one whole revolution clockwise.
- By means of the screw of adjustment of turns achieve single turns of the engine in 650 ± 50 in a minute again.
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Check and adjustment of installations of a corner of an advancing of ignition and turns of idling on engines of models of the late years of release equipped with system of injection of fuel (EFI)
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- Connect a stroboscope to a wire of a spark plug of the first cylinder (follow instructions of the manufacturer of the device).
- Disconnect an electrical wiring from the valve of the additional air (AAS) located in a back part of the delivery camera of an air path (see an accompanying illustration).
- Start the engine and warm up it up to the normal working temperature. Two-three times lift engine turns to 2000 ÷ 3000 in a minute, again dumping them then to single.
- At the engine working at single turns illuminate a stroboscope a distributive tag on a pulley of a bent shaft and make sure of combination with a mark 10 ° scales on a cover of the drive of the gas-distributing mechanism.
- case of need correct installation of a corner of an advancing of ignition, having weakened a fixing bolt and having as appropriate turned the distributor case.
- Upon completion of adjustment tighten a fixing bolt of the distributor.
- Make sure that turns of idling of the engine are supported on value 600 ± 50 in a minute. In case of need correct them rotation of the adjusting screw.
- Kill the engine and connect an electrical wiring to the AAS valve.
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