misfire problems - Ford Mustang Forum
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post #1 of 3 (permalink) Old 09-25-2019 Thread Starter
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misfire problems

2008 Mustang GT 4.6 3 valve misfire cylinder 5 new coil packs, new spark plugs ( actually made it run worse ) new injector cylinder 5 please any suggestions. Thinking of going to Ford and let them diagnose it and tell me what the problem going to check fuel pressure next

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post #2 of 3 (permalink) Old 09-25-2019
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If you're still getting the same cylinder 5 misfire code, try swapping the coils around with cylinder 6. If the misfire code changes, you've found the problem. If it doesn't, repeat the procedure with the spark plugs and, if necessary, again with the injectors.

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2006 GT Deluxe - 5MT - 12.50 @ 109.61
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post #3 of 3 (permalink) Old 09-25-2019
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what plug did you use? mileage?
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Lots of bolt on goodies...
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