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Discussion Starter · #1 ·
I drive a 2014 eco 6spd, the only thing that i have done to it is a 2.5in exhaust from resanator back. If i am acelertating the car will stumble or misfire fallowed by a backfire i do not notice any smoke. and i noticed the last time i changed my plugs had small amount of oil on plug 1 so i changed the valvle cover gasket and spark plug tube seals. so i thoght maby the oil might have been causing the missfire but pulled my plugs back out all clean and dry. I am planing on doing a compression and leak down test in the am. If i could get some guidance in the right direction that would be greatly appricated, do to the fact that i am 10,000 miles over warrenty so please let me know what you think.

thanks.
 

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2014 LT program car, Pull Me Over Red
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This may not be the issue and possibly I'm shootin' in the dark, but do you have a tune? If so does the tune take into account your exhaust modifications?
 
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