missfire cylinder #7 - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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post #1 of 6 Old 09-04-2009, 09:21 AM Thread Starter
rumblelobster
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missfire cylinder #7

ok plain and simple engine light kicked on while my truck was idle outside my house ran it on my buddys scanner cylinder missfire cylinder #7 i have so much as opened the hood in 2 months so i know i didnt knock anything loss any ideas?

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post #2 of 6 Old 09-04-2009, 09:45 AM
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i have so much as opened the hood in 2 months so i know i didnt knock anything loss any ideas?
Translation:

" I haven't opened the hood in 2 months, so there's no chance that I messed anything up"


Sorry, I couldn't resist. Anyways, time to do some tune-up maintenance. Spark plugs (gapped to spec), wires (route as per TSB http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm), distributor cap and rotor. Report back if problems persist.


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post #3 of 6 Old 09-04-2009, 10:04 AM Thread Starter
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here's my thong the the damn tune up is mabey got 30k on it i pulled the plug and wire plug looks good and the wires perfect i dont even feel the miss when i power brake it? lol i said i didnt touch anything cause thats always everyones first question " what did you touch"

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post #4 of 6 Old 09-04-2009, 12:11 PM
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It's hard to notice an intermittent misfire on one cylinder, especially an 8 cylinder. remove the distributor cap and check for any spark damage inside. I've gone one year with a tune up and the distributor needed to be replaced.

If you have a spark tester you can hook it up and confirm the misfire.


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post #5 of 6 Old 09-04-2009, 12:34 PM
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my 318 dak turned out to be a bad pcm, #6 went first then a month later the next cylinder went. First check would be to inspect the fuel injectors and spark system

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post #6 of 6 Old 09-04-2009, 07:29 PM
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Ya first things to check are spark and fuel. try swapping plugs, wires, and injectors to see if the misfire moves to a different cylinder then you know whats causing it. And if none of those are the cause, next would be to do a compression test. Hope you figure it out.

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