Okay so this truck is a k1500 with the 350 & 700r4. Truck for the longest time would have an occasional hiccup and cut out just once every blue moon. about a month ago it got really bad. Especially when overdrive kicks in, the whole truck shutters and cuts out (gets worse when you give it more gas) but will stay running. It also does it in the higher gears but not as badly. It also doesn't really do it with very light acceleration. I rebuilt the throttle body and that seemed to fix it for about a month. Just recently started doing it again really bad. I after quite a bit of research i decided i would replace the ICM, cap, and rotor. Got an expensive ICM. Didn't fix it, nothing changed. Any ideas or input is greatly appreciated! I need to get home for thanksgiving in a couple weeks & need this resolved!!
Additional info: When truck is cold, sometimes it will fire up but die immediately. Also when it is cold it runs like crap, coughing and sputtering. It clears up when truck is warm. Still can here an occasional cough at idle when warm but clears up about 98% Trans was rebuilt awhile ago, the shop had a difficult time getting overdrive to work and thought something was up with the computer. I think they by-passed something to get it to work. Not sure.
Additional info: When truck is cold, sometimes it will fire up but die immediately. Also when it is cold it runs like crap, coughing and sputtering. It clears up when truck is warm. Still can here an occasional cough at idle when warm but clears up about 98% Trans was rebuilt awhile ago, the shop had a difficult time getting overdrive to work and thought something was up with the computer. I think they by-passed something to get it to work. Not sure.