why does cylinder 2 misfire?

Asked by George Mar 12, 2021 at 05:43 PM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

the codes show a misfire in cyclinder 2 consistently. it also includes cylinder 6
and 7 on occasion. the fuel injector and coil work and new spark plugs platinum
gapped properly. everything is checked out but it still misfires. after putting 8
new platinum plugs in, it runs worse. what is the problem?

2 Answers
155,535

James answered 3 years ago

Compression test that cylinder. If it reads very low, there's your problem. Burned valve and it's not worth fixing! Hope that helps! Jim

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5,325

Trippmeister answered 3 years ago

Could be bad coils, or bad PCM (computer), if not the compression issue. Intermittent, gives me a clue.

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