94 gmc with tbi 350 runs fine in driveway, i can rev it to redline, down the road at about 50 mph it pops and start missing, stop restart and it runs fine up to ab out 50mph then starts doing it again

94 gmc with tbi 350 runs fine in driveway, i can rev it to redline, down the road at about 50 mph it pops and start missing, stop restart and it runs fine up to ab out 50mph then starts doing it again 1 Answer

I have a 1990 gmc seirra 1500 4X4 with the 5.7 350 in it....im having trouble with it missing and backfiring thru the intake after it warms up...it runs fine cold....i 've replaced the plugs , wires , cap , button , and fuel filter and the fuel pump is about three yrs old...any ideas or experiences? 3 Answers

It seems to me like its choking itself to death....make sense?.....what would cause that?

ive got a 94 gmc with a 350. it runs for a min then jus dies. itll turn over but tnot start up. bu the next day itll start again. i nedd to know what to do 2 Answers

replaced the fuel filter,fuel pump,plugs & wires,distributer,starter,carb... pump relay,computer,battery. ive tested the coil(its good),. im hitting a wall in what it can be to make it run right again...

my 95 z71 gmc 4x4 350 tbi runs great half the time but sometimes when warm it skips and cuts out like its flooded. when shut off or stalls it wont start unles gas is held to floor and once it starts i 4 Answers

i have to hold gas to floor to keep it running it eventually clears out blowing smoke and will run

I have a gmc sierra 07 model, 4 whl drive with a 6 in lift. I put it in drive and push the gas and it goes fine but will not shift from 2 to 3 at all. Sometimes i put it in gear and it jerks hard and 1 Answer

My truck don't wanna shift from 2nd to 3rd, and sometimes won't go in 1st. Also at times when going from park to drive or to rev it jerks real hard and dies. U can hear the trans when u change fr...