I Need Help R32 Stutter Problem. Lack Of Responsivness Too.

[Vertex32R]

HI all ,

OK i need any info i can get i have a R32 gts-t

it some times just cuts out on accleration and wont do nothing till i back off then it stutters and runs again.

Here is a list of parts ive replaced trying to fix this problem.

AFM

Fuel pump

O2 sensor

TPS

Crank angle sensor

Checked all Coil packs

Igniter.

If anyone has had a similar problem and fixed PLEASE tell me how.

Edited July 26, 2006 by Vertex32R

[mad082]

spark plugs?

also what mods, and boost, do you have? it could be that you have hit rich and retard mode.

[d00dz]

Sorry to hijack this but can I ask how much was it to replace the Crank angle sensor?

[R33-Lovr]

It could be your BOV my friend has the same probl;em on his 200 he found out it was the BOV on the dyno ,

no 1 can really say anything unless you tell us what mods u got in da car..

[Vertex32R]

ok list of mods:

Walbro 620hp fuel pump

GTR injectors+coil packs

Rebuild HF turbo running about 12psi (boosted by A little turbosmart bleed valve)

Apexi Air intake

Hybrid GT FMIC

Sparkies are iridium (NGK)

Full HKS Hi-Power Exaust (turbo back)

Hi-flow cat.

Balanced Lightwight pully set.

Lightened Fly wheel.

thats bout all i can think of rite now got some transmission mods but i think they are irelavent.

oh and i dont have BOV at all. (steel plate to block it)

And to add the Crank angel sensor takes 5 min to change it cost me $80 for a spare.

Also for some reason my car idles at about 1200 rpm....and my timings ok so i dont know WTF

it never used to do this and when it was running good i got a good 187rwkw...

so you can understand why im so upset....last dyno run got me a humble 145rwkw and they guys said was my O2 sensor so i changed it but no help....the car now lacks responsiveness and still has the shuting off problem.

any help will be much apriciated

Ta.

Edited July 25, 2006 by Vertex32R

[blind_elk]

For the 99 zillionth time, the O2 sensor has no effect on accelleration, or lack of it; it only works on cruise!

Now, what engine management are you running. I notice you are running GT-R injectors and a huge fuel pump, but I can't see anything about an aftermarket ECU.

What spark gap?

[Vertex32R]

For the 99 zillionth time, the O2 sensor has no effect on accelleration, or lack of it; it only works on cruise!

Now, what engine management are you running. I notice you are running GT-R injectors and a huge fuel pump, but I can't see anything about an aftermarket ECU.

What spark gap?

Gap is 0.9 mm

Ecu is stock with a mines sticker sealing it it came like that.

Also got a malpassi Fuel reg tuned on the dyno.

[Guest 40th-edition]

For the 99 zillionth time, the O2 sensor has no effect on accelleration, or lack of it; it only works on cruise!

Now, what engine management are you running. I notice you are running GT-R injectors and a huge fuel pump, but I can't see anything about an aftermarket ECU.

What spark gap?

The O2 senser cuts out on idle and fast acceleration..

have u tryed fuel filter??

injector pulse??

[blind_elk]

And when was the last time the injectors were cleaned?

I strongly suspect it's somehow running rich - and rich mixtures don't make power, and might cause flooding on accelleration.

[Vertex32R]

Injectors where serviced when i put them in about 6 months ago.

I dont know WTF it is but its gradualy getting worse.

i think its time for a dyno run ill let you guys know the results so ppl can learn from this but please continue postingn ideas.

[devos2be]

Vertex im having the same dramas and more let me know how you go and mine is stock r32 4 dr

Ive pretty much checked the same shit you have as well .

[Simon-S14]

if the dyno guys dont know that the o2 sensor has no effect on acccel then i would be going somewhere else... find someone who can do consult on your car and see whats up with it.

[Jmaac]

I would get the mines ECU retuned to suit Aus octane levels if it was a fresh import, o/wise isnt the impedance of the GTR injectors different to the GTST?

Better yet get a greddy emu

[phiboy]

getting same prob too guys. mine stalls on idle and throttle cuts off sumtimes and then it jerks like crazy. usually to avoid the problem i kick the clutch and rev it hard. todat throtle jus died for like 2 mins. pretty dangerous.

car: 1990 r32 gts-t type m

stock standard motor running invidia cat back zorst 3"

stock boost 10psi

stock cooler and airbox too

my mechanic tetsed the injectors and fulr no prob there and throttle body is fine. NEED HELP pls cheers

[Terkie]

mine's having the same problems too... everything's fine until 3000RPM - 4000RPM, then after that, it's fine again..

It backfires and stutters until i take my foot of the throttle.

(Standard RB25DET)

[snappy_]

I'm getting all those problems too, its getting to the point where im just about had enough and might sell the thing.

[silversr33]

mine stalls on idle and throttle cuts off sumtimes and then it jerks like crazy.

I reckon might be two different problems there.

If the boost builds and builds and then suddenly cuts off altogether with an almighty jerk of the chassis. Normally this is a pretty classic overboosting symptom. The ECU then goes shit, if this keeps going it's gonna blow the head gasket and shuts it off I believe.

Wow I can't believe you're still driving it when it's doing this man lol, I overboosted mine at first, above happened and it's (as I'm sure you've experienced) such a huge, strange and absolutely wrong feeling thing to happen in the car for it to cut boost and jerk like that, alarm bells were going off in my head straight away when it happened to me lol.

But you're not overboosting soo.....I dunno? ECU thinks you are for some reason - something dodgy, vaccuum lines all in tact?

Dunno, I'm FAR from an expert - you should ask one asap dude, cos cutting the boost suddenly like that is ECU's last resort "you're gonna blow it" tactic.

For most of the other problems listed above - misfires etc, I'd get the coils checked. If it's not the injectors it's probably a blorked coil I think?

I dunno, I just pick up stuff I see and hear around the traps, one of you expert guys come explain

PS Phiboy if your mechanic doesn't know the cut-off is usually associated with overboosting, he's either the worst mechanic ever or he's never even looked at a turbocharger. Either way, I'd be switching. Dunno where you live but if you live in brissie I can put you onto a competent and thorough but not "boutique tuner price" mechanic, he doesn't claim to know everything about skylines but he has rebuilt his own 11 second, concourse winning car from the ground up - so you know he does it cos he loooooooooves cars.

And he's my uncle

Edited December 2, 2007 by silversr33