On the main fuel filter there is a service bolt for installing a pressure gauge to test the fuel pressure.
FUEL PRESSURE TESTING
1. Remove service bolt at fuel filter and attach fuel pressure gauge. Start engine. Measure fuel pressure with engine idling and vacuum hose disconnected from pressure regulator. Pressure should read 36-41 psi (2.55-2.85 kg/cm2 ).
2. If fuel pressure is not within specification, check fuel pump. See FUEL PUMP. If pump is okay, check following:
If fuel pressure is greater than specification, inspect for pinched or clogged fuel return line or piping, pinched, broken or disconnected regulator vacuum hose or faulty pressure regulator.
If fuel pressure is less than specification, check for clogged fuel filter, pinched or clogged fuel hose from fuel tank to fuel pump, pressure regulator failure or leakage in fuel lines.
Sunday, January 2nd, 2011 AT 4:25 PM