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Horrible misfire under heavy load: P0300, and P0171

Rather B Blown

Rather B Blown

New member
Ok so for the past week or so, if i put my foot in her WOT, from about 4k rpm to redline, the car just starts bucking and shaking and flashing misfire codes at me. Got it scanned today and i got a P0300 random misfire and a P0171 System too lean Bank 1. I've looked for vacuum leaks and couldn't find any. Please help this is pissing me off:mad: thanks
 


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