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Discussion Starter #1
got an 07 gt with a paxton blower car is running perfect but keeps throwing misfire codes p0300 in cyilender 1.. doesnt feel like the car is missing also says cyilender misfire in cyilinder 1 on start up (first 1000 revoloutions) any suggestions?
 

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Discussion Starter #3
yea thats what i thought too but it aint that was my first guess. the weird thing is when i had the tune in it it was throughing an engine emergency shut down or dtc p2105 and the car ran like crap it was shutting down and stuff so i took it out and it runs like a beast for some reason but i keep getting this code. have you herd any thing bout mustangs pcm if are crap?
 
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