Question about 1997 Ford F150 Regular Cab

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Low compression in 1 and 3 cylinder

I have a 1997 f150 4.2 v-6 with low c ompression in 1 and 3 cylinder and oil build up in the intake also plugs are a mess except #1

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  • Roberta Smith
    Roberta Smith May 11, 2010

    i presume those cylinders are side by side ... what colour is the exhaust smoke ?

  • yadayada
    yadayada May 11, 2010

    sounds like a new engine for u.



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SOURCE: Cylinder 1 and 4 misfire on my 1997 Ford Explorer

The code description is a giveaway.
It could be one of the coils on the coil pack. Most coils nowadays do two cylinders each. This way car makers can get away with one coil for two cylinders.(lowers costs) One spark fires the air fuel mix in one of the cylinders and the other will fire the cylinder on the exhaust stroke. If the coils are removable, and you are fairly handy with cars,switch two around, the problem will follow the bad coil.

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SOURCE: 1997 ford f150 cyliner 7 misfire

sme problem had to have it put on computer and codes reset

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check for a blown head gasket or burnt valve, being that old prob has a lot of miles on it may need a complete overhaul

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SOURCE: misfire on #1 cylinder 2004 cavalier.

Its a problem with the compression ring,it could be stuck or broken,you can try pulling the spark plug and pouring in some Marvel mystery oil or Seafoam,iif the ring is stuck this might free it.

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SOURCE: my 1997 thunderbird cylinder 3 misfires and i

Les.. After trying everything else that made sense, I installed 2 new coil packs and have never had a misfire since.. I replaced both just to keep things even on both sides.. OCD, lol.....

Posted on Oct 10, 2011

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