Cars with petrol engines
Attention! For diesel engines, the fuel pressure is measured on the fuel line between the fuel filter and the injection pump. This check should be entrusted to a specialist workshop.
No open fire! No smoking! Fire hazard. The workplace must be equipped with a fire extinguisher! Make sure the workplace is well ventilated. Fuel fumes are poisonous.
The condition for the accuracy of the test is a serviceable and charged battery.
1. Tilt back the rear seat and remove the round cover of the fuel gauge in the tank.
2. Remove with pliers, eg Mot. 1265 FACOM clamp 1 with red coupling fastening return hose 2 (see illustration).
3.2 Use pliers to remove clamp 1 from the red coupling of the return hose 2
Attention! For some vehicles with a 1.4-/1.6-liter petrol engine (K4J/K4M) no return hose.
Attention! The fuel system is under pressure. Collect leaked fuel with a rag.
3. Connect a 8 mm fuel resistant hose to the fuel line coupling. And lower the free end of the hose into a measuring container with a volume of approximately 2 liters.
4. Disconnect the fuel pump relay.
5. Bridge relay contacts 1 and 3 with a 1.5 mm piece of wire and let the fuel pump run for about 30 seconds.
The volume of fuel supplied in 30 seconds should be about 1.3 liters. For a 1.4 liter petrol engine (E7J) about 0.83 liters. Fuel pump delivery volume for 1.4-/1.6-litre petrol engine (K4J/K4M) should be approximately 1-1.3 liters in 60 seconds. If the amount of fuel supply is less, then check the supply voltage of the fuel pump. A voltage drop of 1 volt means a volume loss of 10%. Charge the battery or replace it if necessary.
If the delivery volume is still insufficient, replace the fuel pump.
6. Connect the fuel hose, fix it and secure it with clamp I (see illustration 3.2).
7. Start the engine and check the tightness of the hose connection.
8. Replace the cover and replace the rear seat.