(Trail Leader)

11/04/07 01:45 PM

Re: VIBRATION From Engine?

Also look for any cylinder ballance problems. All it takes is a missing vacuum fitting at one port or a small leak to get one cylinder to run lean enough to make the motor shake.

I have put a scope on the O2 sensor at idle as a way to pinpoint a vacuum leak. You could see the blip in the voltage as the one lean cylinder fired. Turns out I forgot to plug a port vor the cruise control on the intake manifold that was located in front of cylinder #3.

A compression test never hurts just to be sure.

Kevin

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