car sputters under hard accelleration

[r12037]

my car sputters under hard acceleration, then it backfires, what are the symptoms of a broken throttle position sensor. I have a sr20det stock and it's a s13 red top on a 95 chassis, if anyone else had this problem or have it now please give me your ideas of what you think it could be. thax for any feedback.

[TheTimanator]

at what rpms does it do this? does it still build boost?

[r12037]

it still builds boost, but it does this at around 3500 rpm or when i just press on the gas pedal a little hard.

[Just8aV8]

check your maf, i had the same problem and as soon as i changed out my maf it was fine.. also look for boost leaks, this was a suggestion i got when i posted about this problem.

[TheTimanator]

yeah, I was gonna say check for a boost/vac leak. My car has done this a couple times. Car won't go past 3000 rpm when I'm in gear. It would rev but pop and sputter. Seems like a horrible problem when it first happened.....

[sr240mike]

Your car is running in poo poo mode. Have you run the ecu codes yet? It sounds like a bad tps or maf. If you can rev high and it sputters its most likely just your timing.

[s14slider]

check the coilpacks as well. This is one thing that no one has mentioned yet, but I know this could be your problem. An easy way to check is to pull each one individually and see if anything happens. If nothing happens, then replace that coilpack with a fresh one. Let me know what happens with an update

[jtt220]

Mine was the MAF. I just cleaned it out with carb cleaner; problem gone!

[Enemigo]

so did you just pull the MAF out and clean it? After that it was all fine?? My car is doing the same thing right now.. I already changed the fuel filter.

Jose