Question about 1997 Ford Expedition

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Power loss and slight juking

I put a computer on it said #7 cylinder miss fire. It feels like a fuel prob to. Can u help?

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  • jed kirby
    jed kirby Apr 12, 2014

    I meant power loss and slight jerking

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  • Ford Master
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The cylinder code you have is the problem, find out why the #7 cylinder is dead.

Posted on Apr 12, 2014

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  • Ford Master
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Figure if you are running with 7 cylinders firing instead of all 8 you will have a power loss and jerking from the dead cylinder.

You could have a bad injector which a Noide tester will show or a Voltmeter will show on the power wire to #7 injector. For testing the injector, check if it has continuity so if it does get power, it will work.

Usually the Code will show from the Spark circuit failing. Either the plug, coil on plug or wiring can cause the misfire. On some engines access to the plugs is easier. You could change plug 7 to another cylinder or change coil on top to different cylinder without removing the plug. Clear the computer and see if defect moves from one cylinder to another.

If cylinder 7 is still bad with a different coil, you have eliminated the coil as a problem. Then its either the plug or the wire to it.

Posted on Apr 12, 2014

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SOURCE: 2002 escape miss fire on cylinder one

power not reaching cylinder 1 ignition coil. check electrical connections and wiring for any damage. test for power and ground at cylinder 1.
hope this helps.

Posted on Oct 07, 2009

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SOURCE: I have a 04 ford 6.0 diesel . I have a miss in the

Time for a compression check. That is very new to already have a serious problem, but I suppose you could have a cracked ring or head gasket leak.
By the way, diesels require a special compression gauge because they are much higher than gasoline engines. Perhaps you can rent one at Autozone?

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