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daveymc29 · 08-15-2018, 10:32 PM

Check Compression. If just one cylinder is really low or zero it could be a valve stuck open. I put about three tablespoons of Marvels Mystery Oil in the errant cylinder when it happened to me. Put the plug back in the hole and cranked it a few revs with the key off. Next morning I put in the rest of the plugs and drove to coffee. Been driving it since for about two years or more. Comp. was 1 94, 2 0, 3 94 and 4 93. Now all are 94. Happy me.

08-15-2018, 10:32 PM	#15
daveymc29 Senior Member Join Date: Sep 2010 Location: Danville, CA Posts: 1,554	Re: Jerky Runner Check Compression. If just one cylinder is really low or zero it could be a valve stuck open. I put about three tablespoons of Marvels Mystery Oil in the errant cylinder when it happened to me. Put the plug back in the hole and cranked it a few revs with the key off. Next morning I put in the rest of the plugs and drove to coffee. Been driving it since for about two years or more. Comp. was 1 94, 2 0, 3 94 and 4 93. Now all are 94. Happy me.