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K just figured it on customers 03 neon. Checked pretty much all threads and got lucky. Basically all threads want you to clean all ground positions thoroughly. They also state to back track every wire from coil back to pcm. This car would run good then develop a strong misfire, like running on 2 or 3 cylinders after approx. 15 mins of driving. Someone had already changed the plugs, wires, coil, cam sensor before i got it. Everyone else changed that in the threads to no avail.. Solution, change your pcm or consider flashing it at your dealer. I ordered a reman pcm from auto computer exchange for 165$ plus 45$ freight to Hawaii. Plug n play -mystery solved, don't waste time changing all those parts. Oh and some guys cars don't even run. Change or flash your pcm.

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14y ago

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