I have a 94 GMC 2500 with a 5.7 TBI. Once the motor warms up, if I accelerate to the floor it will hesitate and back fire through the TBI and then takes off. I have changed and checked about everything that you can and I still can't figure out what is wrong. So does n e one have n e ideas? [:@]

 

how many miles are on the truck, your injectors could be wore out. right now my truck has a burnt vavle and it was sputtering real bad when i floored it (this was before i realized what was wrong with it, now its parked till this weekend when i start working on it) i hope for your sake you dont have my problem, i never exparianced backfiring though