6. Fuel system

SEARCH AND ELIMINATION OF MALFUNCTIONS

By search of malfunctions of the engine begin with check of working capacity and survey of the main systems. If operation of the engine, unstable frequency of rotation of a bent shaft idling or insufficient acceleration is broken, check the following main systems:

1. Electric food:
- battery;
- the burned-through crossing point;
- fuse.

2. Connections with "weight"

3. Fuel supply:
- fuel-supply line;
- fuel filter;
- fuel pump.

4. System of ignition:
- spark plug;
- high-voltage wires;
- ignition coil.

5. System of decrease in toxicity of the fulfilled gases:
- system of ventilation of a case;
- vacuum leak.

6. Others:
- installation of a corner of an advancing of ignition;
- idling rotation frequency.

Malfunctions of the MFI system are often caused by bad contacts in sockets of a plait of wires. Therefore check reliability of connection of all sockets.

CHECK OF FREQUENCY OF ROTATION OF IDLING
Prevention

Before check of frequency of rotation of idling be convinced that spark plugs, fuel nozzles, the modulator of frequency of rotation of idling (ISC), a compression, etc. are in an order.

Check conditions

PERFORMANCE ORDER
1. The engine has to be heated-up up to the temperature of cooling liquid of 80-95 °C.
2. Headlights, dimensional illumination, the fan of a radiator and all consumers of electric energy have to be switched off.
3. The transmission has to be installed in neutral situation.
4. The steering wheel has to be established for the movement directly forward.

Check
PERFORMANCE ORDER
1. Connect a tachometer to primary winding of the coil of ignition or the scanner to the diagnostic socket.
2. Launch the engine and leave it to work at the frequency of rotation of a bent shaft idling.
3. No more, than on 5 with increase the frequency of rotation of a bent shaft to 2000-3000min-1 then let's it work idling within 2 min.
4. Determine idling rotation frequency by a tachometer.