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detonation if so why?

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raptor80dad
New User

Jul 16, 2006, 3:38 PM

Post #1 of 1 (1445 views)
detonation if so why? Sign In
hello all new guy w/a question here.
our work truck is an 88 chevy dually w/enclosed utility body , carbed 350 w/AIR system .problem is it just started making a rattling noise from the engine under throttle , more throttle more noise.I'm thinking it is detonation but we use the same gas and keep it tuned up plus it just happened all at once .not sure if it has an ecm or not if so i believe there is a sensor that could be bad if not what else?any help is appreciated !

THANKS
mike





 
 
 






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