Join Date: Mar 2010
Location: Salt Lake City UT
Thanked 25 Times in 23 Posts
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how to get truck out of limp mode
alright so my brother has a 99 cummins with an auto he has been haveing problems with it shifting or lack there of! its started out that the trans wouldnt shift out of first gear until you let off the throttle and then it would shift from 2nd to 3rd at kinda high rpms, until about a week or 2 ago it seems it has gone into limp mode, when its in drive it will stay in 3rd but you can manually shift it and it runs absolutley perfect! so i did some digging and i swapped the pcms from my truck to his truck and i experienced the EXACT same symptoms that his truck had befor it went into limp mode(or atleast it seems like limp mode correct me if im wrong)! so my questions are 1.did i miss anything when diagnosing the problem and 2. how do i get his truck out of limp mode to see if my pcm will fix his problem? ive tried searching for it on google and the forum but cant find any info on how to get it out! any help or suggestions are greatly appreciated!
98.5 24v,fass titanium 150 , 4 inch turbo back exhuast ,300+ injectors,64/71/80 over s475 compounds,edge juice smarty stack,full built RKL trans,studs,SHO vp44