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Old 08-07-2004, 23:30   #1 (permalink)
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confused low power/backfire

Ive done 2000ks on my stroked 347 engine and it has not being tuned yet due to lack of funds etc.It has being running fine till the past couple of days when just out of the blue it backfired quite loud. Today it seemed to get worse, when under normal acceleration it had no power then it would just go all the sudden. It seems to backfire around 2000rpm under acceleration. I was somthing simple so ive checked everything on the intake side,vacum etc. Is there somthing wrong or is it because its not tuned???
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Old 08-08-2004, 01:57   #2 (permalink)
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Re: low power/backfire

did u set timing? cleaned out carb bowls, check the plugs, adjust rockers, check that all valves are working, no bent or stuck ones, never know ontil u look.
fingers crossed its just timing out
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Old 08-08-2004, 05:03   #3 (permalink)
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Re: low power/backfire

Inlet or exhaust?? EFI or carb ??? Check for inlet leaks ??? Check TPS is working.
Check leads etc..Try clossing plug gap down to .035 ??? Maf clean ?? Fuel filter, Fuel pump, fuel reg.Coil ?? TFI module???
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Old 08-09-2004, 04:26   #4 (permalink)
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Re: low power/backfire

Could it be something as simple as the dizzy wasn't tightened and has turned?
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Old 08-10-2004, 20:58   #5 (permalink)
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Re: low power/backfire

Check cam position sensor is set up correctly.
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