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Misfire after spark plugs
I swapped my spark plugs last week 60k miles. Most likely original ones were in there. After the plugs were changed things were good for atleast 100 miles then I’d have slight hesitation when taking off from a stop in first gear but resolved itself after an hour. Then last night I was driving through a tunnel and I got on it alittle and out of no where flashing check engine light that would flash when I was heavy in the throttle. Tried restarting a few times but now the misfire stays. Codes are p0300( random misfire) p0301(cylinder 1 misfire confirmed) and p0305(cylinder 5 missfire) I ordered new spark plug tubes which I didn’t replace and will just replace those while I look around for a cause. Does anyone else have suggestions on where to look other than the classic swapping coils and plugs with other cylinders?
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