GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat - random multipule cylinder missfire

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GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat (https://www.gmforum.com/)

- Oldsmobile (https://www.gmforum.com/oldsmobile-171/)

- - random multipule cylinder missfire (https://www.gmforum.com/oldsmobile-171/random-multipule-cylinder-missfire-292752/)

Danthurs

Jun 24, 2010 06:09 PM

Unlikly because it's a random misfire. A bad injector would be on the same cylinder. That suggests low fuel pressure or a over all ignition system problem like wire harness or ICM

ckos1978

Mar 30, 2011 10:27 PM

Holy Crap! I have the same problem. 1999 Olds 88 with 118K on it. SAME problem too. Misfires under loads just like yours. New plugs and wires, garage can't figure it out either.

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