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1 cylinder misfire above idle 900 1993

Yes I read the FAQ.

My 1993 944T just developed a misfire above idle. I know its isolated to a single cylinder because i have an exhaust leak that dissapears when i floor it and it accelerates. It still accelerates albiet not as good as with all 4 firing. I'm replacing the plugs and wires tomorrow. Any thoughts on what else it could be since its probably isolated to 1 cylinder? Any reccomendation on plugs?












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1 cylinder misfire above idle 900 1993

Changed the wires this morning. Couldnt change plugs...they're nice and stuck....going to spray with PB every day now. It looks like the heat from the exhaust leak (looks like the common gasket leak at the number 1 cylinder. might have destroyed the wire there or at least broke it down to the point of the misfire. I'll soon see if the engine works while its warmed up. Anyone know a place in Bloomington that works on volvo's (i'm not taking the exhaust manifold off.








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1 cylinder misfire above idle 900 1993

i used ngk...they seem to work well...

could you be seeing tracking in the dizzy cap...i would certainly have it off, clean it and the rotor arm and check VERY carefully - i would say just replace both but the caps arnt that cheap...

also check the condition of the plug, this could be indicative of bigger problems (e.g. oil getting into the cylinder and fouling the plug) but probably not...

i suppose it could also be an injector issue...basically you need fuel, air, comression and a spark for ignition...sounds like your not getting one of them to that cylinder!







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