Ryan140
06-23-2008, 08:00 PM
2001 5.7 mercruiser throttle body injection. Engine starts to knock 1500 rpm. Came on all of the sudden. Replace knock sensor and fuel filter. Ran fuel pressure test and it has 30-31psi running. bacuum test @ fuel tank to check for restriction and it has 3" of vacuum. Hooked up to scan tool and showed knock sensor not reacting, used scanner to put engine
at base timing. Knock went away for 30 or 40 seconds and then came back. Someone please help.
at base timing. Knock went away for 30 or 40 seconds and then came back. Someone please help.