Monte Carlo & Lumina Since the 1970s, the Monte Carlo has been an icon of American stock car racing. A 4-door version, the Lumina, was produced in the late 90's.
Platform: A-, G-, & W-body

misfire after warm up

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Old January 17th, 2011, 4:34 PM
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Default misfire after warm up

My 98 Lumina runs like a champ the first run of the morning (taking the kid to school). After turning off and restarting I get a flashing "service engine" and cutting out on acceleration, slight rough idle, and runs a bit more hot than normal.
Scanner at autozone says misfire on #3 cylinder. What would cause a misfire after warm up, but not after a cold start?
Thanks!
Old January 17th, 2011, 6:40 PM
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pulled #3 plug and it is nice and clean, the gap eas a little wide, I reset it to 60 and put it back, no change on the misfire.
Should I replace the plugs and wires? how can I tell if it is the inector?
Old February 6th, 2011, 9:56 AM
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thanks for all the help!
the misfire fixed itself.......thank God
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