New R33, Hunting Idle

[Espress]

Hey Guys just bought a stock (aftermarket Pod and Cat back) R33 95 with 144000kms on it.

Its pretty clean but now when I idle it revs up and down and occasionally stalls. Other than Idle the car runs extremely smoothly and pulls fine.

My house mate disconnected and reconnnected this hose (in orange circle) and it ran fine for about 5 mins before falling back to the old problem, any ideas on what the problem is?

Thanks heaps for the help guys, really happy with the car except for this.

[Miguelone]

Did you wash your engine bay with water?

[Espress]

Nah mate, btw thats not my engine bay.

[Miguelone]

Ahh ok, have you checked out your coilpacks and your afm? Maybe your fuel filter?

[leer34]

check the two vacuum lines leading to your AAC, split in the smaller of the two hoses was causing me the same problem you are having..sounds to me like your losing air pressure somewhere

[mad082]

also put that hose back on so that your bov works, otherwise you will find the car stalls everytime you stop at a set of lights.

[ricsvtr]

does the idle change when u move the steering wheel? If so, try cleaning the AAC valve, there's a tutorial on these forums

[Espress]

does the idle change when u move the steering wheel? If so, try cleaning the AAC valve, there's a tutorial on these forums

Nah doesnt affect it when I move the steering wheel, also gave the aac valve a good clean with carby cleaner and it didn't fix it, perhaps the valve itself is stuffed?

[lagperformance]

is the factory bov recirculating still if not that will be your problem because factory bov spring to weak and leaks pressure when run to atmo

[gotRICE?]

is the factory bov recirculating still if not that will be your problem because factory bov spring to weak and leaks pressure when run to atmo

The spring isnt all that weak.. it will handle 300rwkw.

It is designed to leak at idle, so it leaks regardless of whether its plumbed back or not.

Id say that it isnt though. And because its leaking that air its overfuelling.

That, or the car is saying FUUU to all that silicon spray. haha.

[LeCoq]

im having the same problem. Im pretty sure its the AFM problem or the turbo is blown

[gotRICE?]

Those are two very different things there.. lol

I suspect that a blown turbo wont cause an idle hunt. It hasnt introduced any sort of air leak, it just wont boost anymore/much.

[LeCoq]

Its not different. AFM is connected to the hose that leads to the turbo.

[skylinesandman]

regardless of weather it fixes prob or not change

the fuels filter also clean the hot wire inside ya afm

if its dirty it will make a huge difference

also check the butterfly in the intake as it can get

a carbon build up and not seat properly in the intake

[skylinesandman]

Its not different. AFM is connected to the hose that leads to the turbo.

not if its in ya intercooler pipe

[LeCoq]

nah mines not connected to the intercooler pipe. I dont have front mount