rd81 Posted June 9, 2008 Share Posted June 9, 2008 I bought an 06 duramax used, auto 4x4. I believe it has an aftermarket programmer installed which is causing an intermitent mis fire on cyl seven at idle only. Is it possible to reinstall the factory settings. Link to comment Share on other sites More sharing options...
BigJayDogg3 Posted June 9, 2008 Share Posted June 9, 2008 What makes you think it has an aftermarket tune on it? Link to comment Share on other sites More sharing options...
rd81 Posted June 9, 2008 Author Share Posted June 9, 2008 I tried to program the truck with a hypertech and it did not recognize factory settings and would not download. I have ran into problems like this before with programmers except I always had the controller to remove the reinstall the factory software. Link to comment Share on other sites More sharing options...
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