2.18.9. Diagnostics of malfunctions of system of injection of Digifant fuel
Before beginning to find malfunction by means of the following table, some preliminary conditions have to be satisfied: mistakes at start have to be excluded. Both for cold, and for the hot engine important, that: before and during start at all not "to give gas". After start of the hot engine it is possible a few "to add gas".
The tank is filled, a mechanical part of the engine is serviceable, the rechargeable battery is charged, the starter rotates on the put turns, adjustment of ignition and system of ignition as it should be, the power supply system fuel is completely tight, pollution of fuel system is inadmissible, ventilation of a case of the engine is correct, electric connection of weight (the engine box of broadcasts bodies) is reliable.
Prevention
REASON
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ELIMINATION METHOD
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The engine is not started
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The safety lock No. 18 is faulty |
To replace a safety lock
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At inclusion of a starter the electric fuel pump does not work |
To check the fuel pump
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The relay of the fuel pump is faulty |
To check the relay
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Sticking of the injecting valves |
To check valves, if necessary to replace
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The valve of cold start is faulty |
To check the valve of cold start
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There are no signals from the following sensors: sensor of temperature of cooling liquid, potentiometer of a butterfly valve, Hall's sensor, sensor of pressure of an inlet pipe |
To check an electrical wiring. To interview memory of the control unit on HUNDRED
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The cold engine is started, but works unevenly
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Contents WITH not normal |
To check contents WITH and idling
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The valve of cold start is faulty |
To check the valve of cold start
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Temperature sensor is faulty |
To check temperature sensor
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The fuel pressure regulator is faulty |
To check the regulator for HUNDRED
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The warm engine is started badly, works unevenly
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The valve of cold start is untight |
To check the valve of cold start
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The system of absorption of air is untight |
To check system of absorption: to allow the engine to work for this purpose on single turns, to grease with gasoline of the place of consolidations and connections on all path of absorption. If turns rise, to eliminate the place of a suction of air
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The vacuum hose to the fuel pressure regulator is untight |
To check the pipeline
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The injecting valves are untight |
To check injection valves
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The engine becomes deaf
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Giving of tension to the fuel pump is interrupted from time to time |
To check shtekerny connections of an electrical wiring on the fuel pump and the relay of the fuel pump for reliability of fastening. To check contacts of the relay of the fuel pump. To clean or replace contacts
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Bad quality of fuel, formation of bubbles |
To fill qualitative fuel
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Fuel supply is too small |
To check the number of giving
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The fuel filter is faulty |
To replace the fuel filter
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The fuel pump is faulty |
To replace the fuel pump
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The injection valve is faulty |
To check injection valves
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The potentiometer of a butterfly valve is faulty |
To check a potentiometer
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The idling stabilization valve is faulty |
To check the idling stabilization valve
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Bad acceleration performance and unstable single turns of the engine
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The system of absorption of air is untight |
To check consolidation and connections of system of absorption
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Adjustment of turns of idling is faulty |
To check the valve of stabilization of idling and a lambda adjustment
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The potentiometer of a butterfly valve is faulty |
To check a potentiometer of a butterfly valve
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The hot engine is not started
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The wrong contents WITH |
To check contents WITH and idling
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Too big pressure in a power supply system fuel |
To check the fuel pressure upon HUNDRED, if necessary to replace pressure regulator
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The pipeline of return of fuel between the regulator of pressure and the fuel tank is bent or hammered |
To clean or replace the pipeline
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The engine temperature sensor is faulty |
To check temperature sensor
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The fuel system is untight |
To make external survey of all connections in the field of the engine and the fuel pump. To tighten all connections
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The system of absorption of air is untight |
To check places of consolidations and connections in system of absorption of air
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The engine works by inertia
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Injection valves are untight |
To check injection valves
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The valve of cold start is untight |
To check the valve of cold start
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