5.1.13. Possible malfunctions of the engine

Probable cause
Way of elimination
1. The engine is not launched
1.1. Fuel supply violation
Mesh filters of the carburetor, the fuel pump or filters of purification of fuel are littered
To wash out filters in unleaded gasoline. To replace the filter of thin purification of fuel, to wash out the filtering filter settler element
The diaphragm of the fuel pump is damaged or tightness of valves is broken
To replace a diaphragm or valves
Water in filters of rough and thin purification of fuel or in a fuel-supply line froze
To warm up settlers of filters or a fuel-supply line hot water
The fuel-supply line is littered
To blow a fuel-supply line compressed air
Jammed the valve of supply of fuel of the float-operated camera in a closed position
To wash out the valve in unleaded gasoline, to replace a sealing washer
1.2. Poor gas mixture (cottons in the carburetor)
See item 1.1
 
Completely air gate is not closed
To adjust the drive of the air gate
Jets are littered: main and idling
To wash out and blow jets air
Thinnesses in connections of the carburetor with an inlet pipe and an inlet pipe with a head of the block of cylinders
To tighten fastenings, if necessary to replace laying
Low level of gasoline in the float-operated camera of the carburetor
To adjust level
Jamming of the valve of recirculation of the fulfilled gases in open situation
To replace the recirculation valve
1.3. Rich gas mixture (cottons in the muffler)
The air gate is covered
To open the air gate, to blow cylinders, turning a bent shaft at open butterfly valves
Tightness of the valve of supply of fuel is broken
To replace a sealing washer of the valve
Tightness of a float is broken
To restore tightness of a float
Air jets of the dosing systems are littered
To wash out jets unleaded gasoline and to blow compressed air
The screw of quality of mix is adjusted on rich mix
To adjust necessary composition of fuel-air mix
The increased gasoline level in the float-operated camera
To adjust level
1.4. The engine is not launched in cold time
The air gate is not closed
To adjust draft of the drive of the air gate. To press for this purpose a pedal of an accelerator and to extend the handle of draft of the air gate. To fix the lever of the air gate on draft in a closed position of the gate
1.5. Malfunctions in system of ignition
The ignition coil is faulty
To replace the ignition coil
The switchboard * is faulty
To replace the switchboard
Lack of reliable contact in a chain of system of ignition
To tighten contacts
The sensor distributor * is faulty
To replace the sensor distributor
Sensors of a control system of the engine ** are faulty
To replace sensors
The control unit ** is faulty
To replace the control unit
2. The engine works unstably
2.1. Interruptions at a small frequency of rotation of a bent shaft in the idling mode
High or low level of gasoline in the float-operated camera of the carburetor
To adjust level
Wrong adjustment of idling
To adjust system of idling
Availability of water in the fuel tank
To merge a sediment
Wrong adjustment of gaps of valves *
To adjust gaps in the valvate mechanism
Breakdown of the runner, plastic cover of the coil of ignition or cover of the sensor distributor of ignition *
To replace the runner, the coil of ignition or a cover of the sensor distributor of ignition
Leakage of flange connections of the carburetor, inlet pipe
To tighten fastenings of flange connections, if necessary to replace laying
The economizer of compulsory idling is faulty
The tube of the locking device needs to be connected to the tube located on other party of the case the vacuum proofreader's tubes are lower. If idling is restored, to repair or replace system of shutdown of supply of fuel. If it is not restored, to wash out channels of idling, to check tightness of caps on the carburetor
Deposit on candles
To clear candles
Leakage of connections of a tube of the vacuum regulator **
To check and if necessary to eliminate leakage
2.2. Interruptions in one or several cylinders of the engine
Ignition sensor distributor cover burn-out *
To replace a cover
Breakdown of a wire of high voltage
To replace a faulty wire
Deposit on a candle
To clear a deposit the sanding device
The spark plug does not work
To replace a spark plug
The two-output coil of ignition is faulty
To replace the two-output coil of ignition
The control unit is faulty
To replace the control unit
3. The increased toxicity of the fulfilled gases
See points 1.2 and 1.3;
 
Wrong installation of a corner of an advancing of ignition *
To adjust an ignition advancing corner
Deposit on candles, the wrong gap between electrodes
To clear candles, to adjust a gap between electrodes
The wrong adjustment of thermal gaps between valves and yokes *
To adjust gaps in the valvate mechanism
Leakage of valves
To grind in valves
Wear of oil scraper caps
To replace worn-out caps
Wear of tsilindro-piston group
To make repair of the engine
Leakage of connections of a tube of the vacuum regulator
To check and if necessary to eliminate leakage
The sensor of absolute pressure ** is faulty
To replace the sensor
4. Deterioration in dynamics of the car (bad acceleration performance of the engine, the engine does not develop full capacity)
Incomplete opening of butterfly valves
To adjust the drive of butterfly valves
See point 1.2
 
Violation of operation of the accelerating pump
To wash out a spray and channels of the accelerating pump, to blow compressed air. To check integrity of a diaphragm
Wrong adjustment of valves of gas distribution *
To adjust gaps of valves of the gas-distributing mechanism
Wrong installation of a corner of an advancing of ignition *
To adjust an ignition advancing corner
The air filter is polluted;
To replace the filtering element
Position of gates <winter-summer> does not correspond to a season *
To install gates in the situation corresponding to a season
5. The raised gasoline consumption
See points 1.2 and 1.3
 
The air filter is polluted
To replace the filtering element
Wrong installation of a corner of an advancing of ignition *
To adjust an ignition advancing corner
Violation of tightness of a power supply system
To check tightness of fuel-supply lines, the fuel tank, a stopper of the fuel tank. To eliminate the found malfunctions
Malfunctions in a running gear of the car
To check adjustment of brakes, bearings of naves of forward wheels, air pressure in tires
High level of fuel in the float-operated camera
To adjust level
The carburetor is polluted
To wash out the carburetor
The air gate remains partially covered
To adjust fastening of draft of the drive of the air gate
Leakage of connections of a tube of the vacuum regulator
To check and if necessary to eliminate
6. The engine overheats
The thermostat is faulty
To replace the thermostat
The belt (belts *) the drive of auxiliary units revolves
To adjust a belt tension (belts *)
Late ignition *
To adjust an ignition advancing corner
See point 1.2
 
The radiator is littered
To wash out the cooling system
The sensor of a signaling device of an overheat of cooling liquid is faulty
To replace the sensor
7. The engine continues to work after switching off of ignition
See point 6
 
Low-octane gasoline is applied
To apply gasoline with the recommended octane number
8. Detonation knocks in the engine
Early ignition *
To adjust an ignition advancing corner
Deposit on walls of combustion chambers and the bottoms of pistons
To clear combustion chambers and the bottoms of pistons of a deposit
Low-octane gasoline is applied
To apply gasoline with the number recommended active
9. Low pressure of oil
Contamination or jamming of the reducing valve in open situation
To wash out valve details, to clean a nest in the case of the oil pump
The sensor or the index of pressure of oil is faulty
To measure pressure the control manometer and if necessary to replace faulty devices
Engine overheat
To remove the overheat causes
Easing of effort of a spring of the reducing valve
To replace a spring
Wear of inserts of a bent shaft
To replace inserts
Wear of details of the oil pump
To replace the oil pump, to replace * laying between a cover and the case thin paper laying
The underestimated or overestimated oil level in an oil case
To add or merge oil to the recommended level according to the index
10. The raised oil consumption
Wear of piston rings
To replace piston rings
Contamination of system of ventilation of a case of the engine
To carry out service of system of ventilation
Leak of oil through epiploons and thinnesses of connections
To replace epiploons and to restore tightness of connections by tightening or replacement of laying
Destruction of oil scraper caps
To replace oil scraper caps
11. Knocks in the engine
Big gaps between yokes and valves
To adjust gaps in the valvate mechanism
Wear of conrod and piston group
To make repair of the engine
Wear of inserts of a bent shaft
To replace inserts
12. Knocks in a forward part of the engine (ZMZ-4061, ZMZ-4063)
Zakusyvaniye of a plunger of a gidronatyazhitel of a chain
To sort a gidronatyazhitel, to establish the reason of a zakusyvaniye and if necessary to replace worn-out details
** For UMZ-4215, ZMZ-4025, ZMZ-4026.
** For ZMZ-4061, ZMZ-4063.