Help Please

[PTOOSH]

Hi Guys

I have just recently bought a 90 model R32 GTR it ran well when i bought it home but now it feels like its starving of fuel about 4000 revs below that runs like a dream but when the turbo's really start to work it doesn't want to rev like it should and shutters a bit one of my mates thats a mechanic said it had a bad batch of fuel so i run the tank out and changed the fuel filter and its still doing it.

Any help on this problem would be great the motor is pretty much standard so is pretty responsive and goes really well to 4000-4500 revs than just starts to play up.

Help please

Kel

Edited June 18, 2009 by PTOOSH

[eeiko321]

Hi Guys

I have just recently bought a 90 model R32 GTR it ran well when i bought it home but now it feels like its starving of fuel about 4000 revs below that runs like a dream but when the turbo's really start to work it doesn't want to rev like it should and shutters a bit one of my mates thats a mechanic said it had a bad batch of fuel so i run the tank out and changed the fuel filter and its still doing it.

Any help on this problem would be great the motor is pretty much standard so is pretty responsive and goes really well to 4000-4500 revs than just starts to play up.

Help please

Kel

where did you purchase this car, private or dealer?

it could be a no# of things, you sure this mate of yours is a mechanic and gave you a half arsed response like that?

so far from what your telling me...it could be:

Fuel pumps could be faulty and not supply enough fuel...

the Ingnition systm could make the car sluggish if at fault.

Check your ignition leads and plugs whilst your there and let us know

[Touge Kyousou]

I've had a bad batch of fuel a long time ago on one of my previous car and it really was noticeable. I remember past 6000rpms it just wouldn't want to go anymore. But it also affected the entire rev range not just a part of it.

Does sound like a pump/ignition problem.

Did 32 GTRs have knock sensors on the engine ? If it detects crap fuel, the computer will start retarding ignition at mid to high rpms when you're giving it.

GL

[PTOOSH]

Thanks mate i bought the car privately. And yeah my mates a light vehicle mechanic with work don't know how much he knows about imports.

It has a walbro 500hp fuel pump in it so it should be getting enough fuel but ill have a look at the leads and plugs.

Thanks for your help ill get back to you.

Kel

[KamikazeNinja34]

Had a similar issue on my 33 but was at any rev range - might be worth looking at your AFM? just in case?

[DAN00H]

check your timing/ CAS/ Timing belt. AFM's generally go into limp mode about 3000rpm.

[Crans]

Also check for an air leak mine did something that sounds exactly like that. It was overfueling like a biatch as air was missing would hit a wall at 4500 - 5000rpm. Get a wide band on it and check whats comming out

[TezGT-R]

before you do any of that stuff check all your cooler pipes for splits and loose clamps. mate had same symptoms, above 4000 shudder no power etc, was a cooler pipe clamp coming loose. When it hit boost it'd pop open, shudder etc, then when you back off it closes again. simple stuff before you mess with the sensors and other assorted expensive bits

[PTOOSH]

Thanks guys

I just took it for a strap on low boost 9.9 psi and it did it a little but nothing like it does on high boost 13.9 psi.

Thanks heap0s you've given me heaps of stuff to try

Kel

[KamikazeNinja34]

before you do any of that stuff check all your cooler pipes for splits and loose clamps. mate had same symptoms, above 4000 shudder no power etc, was a cooler pipe clamp coming loose. When it hit boost it'd pop open, shudder etc, then when you back off it closes again. simple stuff before you mess with the sensors and other assorted expensive bits

Damn hoses coming loose!

Thats why i mentioned the AFM. When i had a similar problem...they tell me the vacuum hose to the AFM had gotten disconnected so it wasnt getting the right reading! such a minor thing, so many major pain in the ass consequences =b

[PTOOSH]

Damn hoses coming loose!

Thats why i mentioned the AFM. When i had a similar problem...they tell me the vacuum hose to the AFM had gotten disconnected so it wasnt getting the right reading! such a minor thing, so many major pain in the ass consequences =b

Thanks guys had a look through it today and found one of the afm's was buggered and full of water looks like were on the right track thanks for your help really appreciate it.

Kel

[KamikazeNinja34]

Anytime =D