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Old 07-26-2012, 06:04 AM
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Jimbo17 Jimbo17 is offline
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I agree with what others have said and I would start with a vacuum gauge connected near the manifold to check for leaks at different RPM's

There is one other thing I would also try and that is adding one quart of Marvel Mystery Oil into the crankcase.

I had an intermittent miss on my 350 that drove me crazy!!!

I changed plugs, wires, vacuum lines, distributor and everything else I could think of that would cause a miss.

An 88 year old friend of mind who had worked on engines his entire life told me to try and Marvel Mystery Oil because he said I think you have a lifter that is sticking just some of the time.

Long story short I tried it and never had the problem again.

Hope that helps. Jimbo
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