Test Point 7 - Fuel Pressure
TEST POINT 7Fuel Pressure
1. Unscrew capped nut on test connection. Catch escaping fuel.
Note: Be careful that sealing ball does not tall out when unscrewing capped nut. Escaping fuel could catch fire on a hot engine!
2. Connect pressure tester P 378 on distributor pipe.
3 Start engine and measure fuel pressure at idle speed.
Specification: 2.0 bar
4. Pull off vacuum hose on throttle housing. Fuel pressure must rise.
Specification: 2.3 to 2.7 bar
5. Slowly pinch return line of pressure regulator with a clamp. If pressure remains below 4 bar, check fuel filter or replace fuel pump if necessary
If engine cannot be run, bridge fuses 16 and 17 on fuse box.
Fuel pump must run
Specified testing pressure: 2.3 to 2.7 bar