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

If fuel-supply lines are removed, previously to clean them means of cold cleaning.


REASON
ELIMINATION METHOD
The engine is not started
The safety lock No. 18 is faulty
To replace a safety lock
At inclusion of a starter the electric fuel pump does not work
To check the fuel pump
The relay of the fuel pump is faulty
To check the relay
Sticking of the injecting valves
To check valves, if necessary to replace
The valve of cold start is faulty
To check the valve of cold start
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
The cold engine is started, but works unevenly
Contents WITH not normal
To check contents WITH and idling
The valve of cold start is faulty
To check the valve of cold start
Temperature sensor is faulty
To check temperature sensor
The fuel pressure regulator is faulty
To check the regulator for HUNDRED
The warm engine is started badly, works unevenly
The valve of cold start is untight
To check the valve of cold start
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
The vacuum hose to the fuel pressure regulator is untight
To check the pipeline
The injecting valves are untight
To check injection valves
The engine becomes deaf
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
Bad quality of fuel, formation of bubbles
To fill qualitative fuel
Fuel supply is too small
To check the number of giving
The fuel filter is faulty
To replace the fuel filter
The fuel pump is faulty
To replace the fuel pump
The injection valve is faulty
To check injection valves
The potentiometer of a butterfly valve is faulty
To check a potentiometer
The idling stabilization valve is faulty
To check the idling stabilization valve
Bad acceleration performance and unstable single turns of the engine
The system of absorption of air is untight
To check consolidation and connections of system of absorption
Adjustment of turns of idling is faulty
To check the valve of stabilization of idling and a lambda adjustment
The potentiometer of a butterfly valve is faulty
To check a potentiometer of a butterfly valve
The hot engine is not started
The wrong contents WITH
To check contents WITH and idling
Too big pressure in a power supply system fuel
To check the fuel pressure upon HUNDRED, if necessary to replace pressure regulator
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
The engine temperature sensor is faulty
To check temperature sensor
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
The system of absorption of air is untight
To check places of consolidations and connections in system of absorption of air
The engine works by inertia
Injection valves are untight
To check injection valves
The valve of cold start is untight
To check the valve of cold start