What's going on if my 97 GMC sierra starts up runs fine until it warms up then it start to backfire and shuts off and will not start back until it cools off...then repeat ?????????

What's going on if my 97 GMC sierra starts up runs fine until it warms up then it start to backfire and shuts off and will not start back until it cools off...then repeat ????????? 5 Answers

94 GMC sierra starts and runs fine till it warms up then backfires shuts off and will not start again until it cools off and repeat??? I asked same question but about a 97 was told it was mass airflow 12 Answers

I took the bed off my GMC 1500 1990 truck and changed the fuel pump, it started fine, put the bed back on it and now it will not start, what happened? 2 Answers

the truck would not start so we took the bed off and changed the fuel pump. It started and run fine, we even drove it down the rode. After we put the bed back on the truck the truck would not start. H...

I have a 1998 GMC K1500, will not start until I pour fuel down throttle body, after that truck will run fine until it sits for about 4 hours, then will not start again, any idea? 7 Answers

I have a 1998 GMC K1500, will not start until I pour fuel down throttle body, after that truck will run fine until it sits for about 4 hours, then will not start again, any idea? Once truck has been s...

04 gmc sierra 1500 5.3 died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was zero) anyways checked fire none checked injectors they wasnt working either(built fuel pressure then unplugged fuel relay then turned engine over and the pressure stayed the exact same) i assume it might be the crank sensor but i would think it would throw a code, anyways came back this morning and before doing anything for the hell of it i checked the gas cap and tightened it and it fired up perfect three different times and the last time i let it run and it died after bout 45 seconds (fuel pressure reads 55) and after it died its doing the same thing cranks but wont fire or start 1 Answer

died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was...