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PostForum: GM Performance Forum   Posted: Wed Jan 02, 2019 7:15 am   Subject: 96 chevy 7.4L dually wont run with cylinder 1 plug in

I got a 96 3500 that had the 0411 pcm conversion done on it. It wasnt running and i messed around with it A bit got it to run when i took out the cylinder 1 plug but as soon as i put it back it it die ...
 
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