Intermittent Problem With R32 Gtst

[bre]

Hey all

I have a problem with my skyline. Only occasionally I will start it and begin to drive.. then when I'm accelerating it seems to lose power and slightly "bunny hop" the bunny hops are not aggressive. it just doesn't seem to be able to get to higher revs. It does happen when it's cold but by the time it's warmed up it still has the problem.as I said it only does it every now and again. Does anyone have any idea what could be wrong?

[bre]

I forgot to mention. . It's an automatic

[Ben C34]

Need heaps more info to give you any idea.

[bre]

What sort of info?

[Ben C34]

as much as possible. What revs it happens at? Any mods? service history? etc.

[bre]

No mods except for a coke can in the blow off valve (bought like that)

Don't know the service history from previous owner. Has had a complete full service. Was happening before I recently got it serviced.. mechanic changed the fuel filter and spark plugs (thinking they were the cause) but problem still persists

It happens at any revs. It happens whenever I accelerate

[cree]

Boost spike? How much boost is it running?

[Ben C34]

You are still being way too vague. When you say accelerate do you mean flat out, or gently accelerating? happens cold or warm?

[Missileman]

Swap out the afm for a known working unit, if this doesn't fix it then do the same with the coil packs.

Edited July 21, 2013 by Missileman

[Ben C34]

Then swap fuel pump, cas, coil loom, c as loom, vct solenoid, ecu etc

[niZmO_Man]

R32 doesn't have VCT

Try a known working AFM.

[Kanaric]

Found this thread and am bumping it because I have a similar problem. I'll describe it in more detail though.

This happens occasionally, and only early in any drive if it does. Not like right out of my garage but 1 or 2 minutes in. I will probably happen at a frequency of about once every 3 times i drive the car.

Once it happens it will happen until i let it sit out of boost for a while and it will be ok. I even did 5 runs at autocross after this, problem did not crop up.

How violent it is depends on how much throttle i'm using. If I hold it down as i'm trying to accelerate and not let it if it reminds me as if someone who is just learning to driving a manual is driving the car. Off-boost it doesn't do this. It only does it at RPMs in which the turbo is building or holding pressure.

Same recommendations? I don't have another AFM to try otherwise I would but I could install my powerfc and put in a Z32 AFM.

[ima_slap_joO]

I had an r32 gtst back in 2004 which would do that, the car would lurch back and forth violently under acceleration. Turned out to be a really dirty fuel filter, wasn't allowing sufficient fuel to the rail so the car was suffering fuel starvation. Upon reflection I'm surprised I didn't destroy the engine, must have been running ultra lean during those periods.

[Kanaric]

I had an r32 gtst back in 2004 which would do that, the car would lurch back and forth violently under acceleration. Turned out to be a really dirty fuel filter, wasn't allowing sufficient fuel to the rail so the car was suffering fuel starvation. Upon reflection I'm surprised I didn't destroy the engine, must have been running ultra lean during those periods.

Did it do this all the time or only occasionally like it's doing for me?

I would think if it were a fuel filter it wouldn't just stop and be fine for hours.

[jonathon]

Maybe look for a boost leak as someone suggested, however when it happened to me it felt like hitting the rev limiter (not really a bunny hop)