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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

Random missfire

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Old Feb 13, 2018 | 03:28 PM
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Motorcraft or Denso. If you can find them, Visteon's are good too.
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Old Feb 13, 2018 | 03:29 PM
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I just want something that won't **** off the computer and won't break the bank.
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Old Feb 13, 2018 | 03:31 PM
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Is it misfiring at idle or while you're driving? I replaced my coils at 90k and it got rid of the misfires. OEM coils at the dealership - they wanted $900 to do the coils and plugs. I bought a set of plugs and coils off ebay for less than $100 and did it myself. No problems since.
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Old Feb 13, 2018 | 03:32 PM
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Those are the 3 brands that are most trusted then.
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Old Feb 13, 2018 | 03:41 PM
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Originally Posted by 01-7700
Is it misfiring at idle or while you're driving? I replaced my coils at 90k and it got rid of the misfires. OEM coils at the dealership - they wanted $900 to do the coils and plugs. I bought a set of plugs and coils off ebay for less than $100 and did it myself. No problems since.
It's only having a missfire at idle until it gets up to temp. Won't do it under any load or when warm. I don't need to fix it right now, it's just an annoyance thing is all.
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Old Feb 13, 2018 | 03:42 PM
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Does anyone have the Motorcraft part number?
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Old Feb 13, 2018 | 03:43 PM
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Here you go. Rock Auto has a great price on them.

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Old Feb 13, 2018 | 03:43 PM
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Like White said, those are the better coils out there and the best working to GEN 10 engines. You can buy the cheap Chinese coils for considerably less money, but quality and longevity comes into big question. Personally, even if I am cheap, would stick with one of ones White suggested. I hate redoing anything on the backs on these engines, AND, I don't like spending extra time replacing defective parts. JMO, of course.
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Old Feb 13, 2018 | 03:43 PM
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Originally Posted by matt-man
does anyone have the motorcraft part number?
They are DG-508's.
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Old Feb 13, 2018 | 03:44 PM
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Originally Posted by white89gt
Here you go. Rock Auto has a great price on them.

Thank you!
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