8D - Fuel Pressure Test at Right Head

8d. Fuel Pressure Test at Right Head





Purpose:
To determine if there is a restriction in the head check valve.





Recommended Procedure:
If necessary to remove the alternator and bracket from the right side of the engine to remove the 1/8-inch pipe plug from the top front of right head. Install Gauge (0-160 psi) Bar 014-00761 or equivalent. Run engine at idle and check for leaks from the line to the gauge. Measure pressure with a full load on the engine. DO NOT brake torque engine more than 10 seconds. After testing, move the transmission range selector lever to N (NEUTRAL). and run the engine for about 15 seconds to allow the torque converter to cool. If pressure measures below specification (30-80 psi), replace right head check valve, which is located on the rear of the right head between the fuel inlet line and the head.

Possible Causes:
- Head check valve