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Misfire and CEL issues
My 07 has started to have CEL misfires showing up, power is robbed w cylinders down. Only 4000 miles on this car. Took the car to the dealer, they replace the plug in Cyl 08, and after 20 miles, back again.
In checking out threads on other sites, this appears to be a wide spread problem. Anyone else had to deal with it and what is the cure?
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2007 Roush Mustang Convertible, Stainless Works Headers, H Pipe, Procharger and Hurst Shifter
2006 Pontiac GTO, Automatic w CAI
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