Quote:
Originally posted by Primal SMX
It was doing it in time to the motor.
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You mean the motor had a misfire in time with the skip in the timing light? In that case - check plugs, leads, cap and rotor. NGK plugs and Factory leads work best.
If your timing is over-advanced, the knock control may be momentarily retarding it. You can check the knock control/sensor by slowly advancing the timing to see that the ECU retards the timing at the onset of pinging.