72 LT1 thumping sound
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Intermediate
Joined: Mar 2008
Posts: 40
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72 LT1 thumping sound
1972 dies on acceleration with thumping sound from engine. It idles & revs normal. Upon acceleration it loses power with loud thumping sound from engine & dies. Fuel pump & fuel filters & air filter & plugs ok.
Any ideas?
Any ideas?
Last edited by ray3222; Dec 10, 2021 at 10:16 PM.
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,251
Likes: 4,319
From: US-PNW
Because it idles and revs normally, it sounds like a transmission/clutch issue since it only happens under motion. Is it a manual or automatic; stock or aftermarket? Has there been any change recently from before the sound began?
Safety Car
Joined: Jan 2009
Posts: 4,000
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From: New York
