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Discussion Starter · #1 ·
My sister has her own G8. Last Friday it started running rough. I lent her my truck and have been trying to figure it out. The car runs and feels like it is missing a cylinder. The check engine light blinks. I limped to to O'reilly's and ran the scan on it. It came up with P307, cylinder 7 miss-fire. It also was setting a MAF code. I got a can of cleaner for the MAF and tried that. I changed all the spark plugs with no change. I swapped out the coil pack and plug wire from my G8. Still same issue. I tried her coil pack and wire in my car and my car runs fine. Where should I go next? is there an easy way to tell if the coil pack is getting signal? Where does the coil pack get its signal from? Should I just take it to a garage?

Any insight is appreciated.
 
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