Flooring pedal to go?

[k20ej8]

ok so i was driving my car last night and down shifted into fourth and pulled, (yea stupid idea im a ricer i know) and shifted back to fifth at redline. then i was driving normal for 5 minutes, next thing i kno when i gas it it wont go, i would have to floor it and it would go and when it would it would be a huge jerk forward. It was doing this for a while down the road constantly then when i cut off the car and checked everything out the next time i drove it still did it but not alot. My car does have random multiple misfires but it wasnt like this before. Could this be a misfire issue? or could it be a fuel issue.. my friend told me my fuel pump resignator could be clogged or dirty. any help plz?


o yea i have a b20b block with ls head

[AnthonyF]

Is your pedal rock hard and it won't move or when you attempt to accelerate it slowly picks up speed but ONLY at WOT?

-Ant.

[Thighs]

check your idle air control valve. and any other vacuum related stuff on the car.

[k20ej8]

no it is not rock hard i have to mash it down and the car will jerk forward or when it does it it feels like its loosing power and it feels like im not gasing it so i let go of the gas for like 2 seconds then press it again and it will be normal.. till it does it again.

[Thighs]

sounds like a vac problem to me.

[AnthonyF]

Did you check everything when the engine was running? So you could hear for a vac leak.

-Ant.

[Barefoot]

check your ignition system.

[k20ej8]

check your ignition system.

checked it, and wouldnt it be doing it all the time? it just comes on once every 10 minutes now. before it was doing it constantly.

also, could i use a b20 dizzy coil on a ls head? ive heard they are the same but idk if i can use the same coil

[Barefoot]

also, could i use a b20 dizzy coil on a ls head? ive heard they are the same but idk if i can use the same coilsame