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Missfire

(1999 Ford Crown Victoria)
in San Antonio, TX on September 21, 2010
I have a bad missfire on my 99 cvpi . Engine has been replaced , coils plugs trans . Only things remaining is the intake and up all electrical and ecu and such . Anyone who can give any help would be very much appreciated . I'm out of $$ and still have a headache lol
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Popular Answer
on September 22, 2010
You did not mention Fuel Injectors. There is one per cylinder on this model, and one could be not working, or conversely could be dumping fuel causing a misfire. Wondering what the cause of engine replacement was...could be a clue.

The best move would be to get some diagnostic equipment hooked up to really analyze engine relative compression and a power balance test - attempting to narrow down to the affected cylinder(s) of misfire. From there, you can inspect the affected cylinder(s) for the plug condition (cracked? Even a new one could be cracked on install...), coil and wiring connector, even a base engine concern with the block or cylinder head (intake or exhaust valve leakage, etc)... Not to mention the fuel injector. Good luck!
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