I have a 96 gmc 1500 and it back fired and cut off and would not crank back up but I can pull the number 3 plug wire off and it will crank but as soon as I put it back on it cuts off

I have a 96 gmc 1500 and it back fired and cut off and would not crank back up but I can pull the number 3 plug wire off and it will crank but as soon as I put it back on it cuts off 2 Answers

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...

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...

HELP! Ok i have a 96' GMC Suburban 5.7. trouble starting. 1)When i turn the key the wants to turn over but it is just flooding. 2) When i turn the key and pump the gas pedal it just flooding. 3)when i turn the key and hold the pedal to the floor(not pumping) it tries to turn but takes est. 10-15 seconds and starts. now once its started i can drive anywhere it seems. But when i turn it off same thing all over again to start it. in last 6months i put a new fuel pump and filter in it. someone said it is a cold cranking problem,but i can go out in the cold and hold the pedal to the floor,turn the key and after 10-15 sec of it trying to turn over it will start. just dont why it wont by just turning the key. 7 Answers

new fuel pump and fuel filter 6 months ago

I have a 1990 GMC Sierra with a 305, I need to put a new engine in it and would prefer going back with a 350. Can I Put any GM 350 in it from the 90's? 3 Answers

My 1990 305 blew up on me and I would prefer to go back with a 350 but can it be any 350 from the 90's? If so what year would be best, I have heard good things about the 5.7 Vortec's. Also its a 5 s...