Test Point 7 - Fuel Pressure
TEST POINT 7 - DME 944Fuel Pressure (Pressure Tester P 378)
There is a cap nut on the end of cyl. no.1 injection line. Unscrew cap nut, being careful that sealing ball does not fall out!
Connect pressure tester P 378 on adapter.
Start engine and run at idle speed.
Test pressure: 2.0 bar (29 psi)
Pull off vacuum hose on pressure regulator.
Test pressure: 2.3 - 2.7 bar (33 - 39 psi)
Squeeze return hose of pressure regulator tight slowly with a hose clamp.
Pressure below 4 bar check fuel filter, replace fuel pump.
If engine cannot be operated: Bridge terminals 30 and 87 b on DME relay G 5.
Fuse no.34 okay.
Specified test pressure value: 2.3 - 2.7 bar (33 - 39 psi)