Question about 1999 Ford Mustang Cobra

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1999 mustang 4.6 not firing on front two cylinders. have spark and fuel. when Running (rough) can pull injecter wire and makes no difference on engine.

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  • anselmimp Jul 14, 2009

    I checked injectors with noid light and the were working



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I would check compression first. you can jump injector wires from a injector that works to one that does not and see if that makes a difference. i had worked on a car that the injectors were not working on a few cylinders so i jumped the injectors well it turned out to be the ecu was bad.

Posted on Jul 12, 2009


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I need help with my 1999 chevy silverado 1500 5.3 4x4 I have a rough idle like its only running on 7 cylinders here are some of the things I've done to try and resolve this issue, changed fuel filter

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Changed plugs and wires and put on a new igntition coil and it is stillmissing on 2 cylinders

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It runs. but when I try to accelerate it fire thru the tbi

sounds like a firing order problem to me make sure all your spark plug wires. are going to the correct cylinder. If the coil hasnt been replaced it is numbered on the top telling you what cylinder that wire goes to. If I remember correctly cylinders 1-2-3 are in back and 4-5-6 are in front

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Sounds like your computer is fried. Check prices at your local recycling yard or EBAY. Ive seen this happen on other makes and models as well, and its always been the computer...

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