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Old 12-26-2002, 10:24 AM   #1 (permalink)
TWS
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Join Date: Oct 2002
Posts: 4
Question

I've got a 425 Olds with a freshly rebuilt top-half of the engine. Now after getting it back together, it has what sounds like a backfire w/ a resonant ping coming through the carb. This only happens when you give it some gas and not while idling. Any ideas of what could be causing it?

Thanks-
Tom
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Old 12-27-2002, 03:16 PM   #2 (permalink)
Wade
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Join Date: Dec 2002
Location: Ok
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Post

Hello TWS
My first guess would be you have too spark plug wire's crossed, assumming all valves are adjusted correctly check and double check
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Old 02-08-2005, 10:38 AM   #3 (permalink)
javi58
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Location: riverside,ca
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I HAVE A 70 CUTLASS WITH A 350 ENGINE, DO VALVES HAVE AND ADJUSTING GAP?.
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Old 02-22-2005, 08:31 AM   #4 (permalink)
jdorour
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Join Date: Feb 2004
Location: Atlanta, GA.
Posts: 123
Post

Olds engines have no valve adjustment (stock).
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1966 Ninety Eight Convertible - 425 Tri-Carb, Factory Dual Exh, Switch-Pitch THM400, 3.54 Posi.
1966 Catalina Wagon - 421 Tri-Power, M21, 4.11 Saf-T-Trac, 8 Bolt Wheels
1989 IROC-Z - 5.7TPI
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