Engine / Ecu Problem

[justinm]

hey guys i have just reciently had my r32 gtst fully tunned and all was good it is on 15psi not to high and it was a safe tune and all of a sudden the car wont rev over 2.5 grand.....i have checked everything that i can but i was just wondering what you guy think it could be.

btw the computer is a haltec v6.....

i know i'll it to the tuners but i just want some oppionions of what it can be before i go spending money i dont have.

any help would be greatly appreciated.

Cheers

Justin Murphy

[700HP-GTR33]

hows your fuel pump...making any noise?

how does it feel like jerking at 2500 or pulling back when you hit it?

My guess would be fuel pump first, sparks second then injectors and AFM third.

[infamous_t]

Running without afms? check you haven't blown a hose/hoseclamp off intake piping.

[justinm]

its jerking when i hit 2500

[blind_elk]

Have you checked the programmable rev limiter in the Haltech?

[SevenAngryPenguins]

its jerking when i hit 2500

+1 for checking cooler piping i had same problem about 2500rpm and 4 psi boost, does it rev up fine in neutral?

[justinm]

i dont have a controlller for the haltech how else can i check it?

i have checked all plugs and piping. when its in neutural i revs fine up to 2500 and then does the same when in gear.....like......bahh....bahh.....bahh with like a half second intervals.

[blind_elk]

i dont have a controlller for the haltech how else can i check it?

Then how did they tune it?

i have checked all plugs and piping. when its in neutural i revs fine up to 2500 and then does the same when in gear.....like......bahh....bahh.....bahh with like a half second intervals.

Sounds awfully like a rev limit being hit. Take it back to the tuner and ask him to fix.

[zertek]

+1 for a rev limiter. your car is manual right???

[justinm]

yeah its man

i am taking it to my tuner next week but i dont really have the money to spend on it.....thats y i wanted to know if it was something i could fix.

[GeeTR]

btw the computer is a haltec v6.....

i dont have a controlller for the haltech how else can i check it?

Iv never heard of a V6... but the Haltech's I've seen just need to be hooked up to a serial port on your laptop.

If its a HARD cut, then it could be the Haltech freakin out, due to a faulty sensor etc.

This will be pretty obvious if you hook a PC up to it with Haltuner installed and in Online mode.

GL