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Old 07-25-2017, 12:21 PM   #3
dirish
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Join Date: Dec 2012
Location: Heart of Tennessee
Posts: 1,120
Re: Engine issue tap, tap, tap tap, tap, tap

I had a detonation issue. New crate tapped under load. It sounded like valve ticking. Vacuum advance adjustment helped. If you adjusted timing, or a new distributor it may be timing. Mine would not do it unless driving. Never at idol, even under throttle. Just a thought.
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