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1997 Ford Aerostar Question: What would cause so many cyl. to misfire.

 

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SonnyMeder, 4.0L V6, Price, UT, March 05, 2011, 16:41
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I took my van in to a mechanic because is was jumping and jerking. He told me my head had a hairline crack. I had no water in the oil and was not over heating. I went to NAPA and got a printout of my codes. It told me cyl. 1,2,4 were misfiring. I am changing the plugs and wires tomorrow.Is there anything else that can cause the misfiring?

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  • Answer #1

    Superbob March 05, 2011, 16:46
     Master

    There could be injector problems, could be intake air leaks. Try the plugs and wires first.

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    SonnyMeder, March 05, 2011, 18:43
     Rookie

    Thanks for the reply. I 'll see how it runs tomorrow ,and go from there if it that does not work.

    Thanks

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  • Answer #2

    DaveJHM March 05, 2011, 22:54
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     Master

    Some 4.0L OHV engines of this vintage did have cylinder head issues. But the symptom would be more about coolant consumption. Also, misfire on 1, 2, and 4 means that both cylinder heads would be in question, not just one. Definitely start with primary ignition components - plugs, wires, and then recheck.

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