Just replaced the spark plugs and coils with shorter boss oem plugs car now shakes a lot during cold start and warm up, goes away after reaches operating temp. If I don't let the car fully warm up check engine light comes on. Only during cold outside weather. Then goes away after a day or 2 after letting if fully warm up. Can't figure out why this is happening. Codes says all 4 cylinders misfire Any suggestions?


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