Fuel Pressure
- Locate fuel pipe cap nut at end of fuel rail. Remove cap being careful that sealing ball does not fall out. Connect a test pressure gauge (P 378 ).
- Start engine and maintain idle speed. Pressure gauge should show 29.4 psi (2.06 kg/cm2 ). Disconnect vacuum line at pressure regulator. Pressure gauge should show 33.8-39.7 psi (2.37-2.78 kg/cm2 ).
- Pinch fuel return line of pressure regulator. Pressure gauge should show a minimum of 59.0 psi (4.13 kg/cm2 ). If fuel pump does not meet specifications, check fuel filter or replace fuel pump and retest.
- If engine will not start, check fuse No. 2. If okay, remove fuel pump relay "U" and bridge terminals No. 30 and 87b. Pressure gauge should show 33.8-39.7 psi (2.37-2.78 kg/cm2 ).