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David W David W is offline
Last Century User
 
Join Date: Oct 1999
Location: Huntsville, Al ,USA
Posts: 1,716
Porsche Crest Backfire

I had the same problem with my 72e, MFI, boy the backfires were LOUD. It was a leaking muffler, when you back off, air (oxy) is sucked into the system, when you get back on it the engiens run so rich, so bang! So I woud ck the timing and then exhaust leaks.
Old 10-26-2004, 09:47 AM
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