Revs Dropping At Idle:: Need Help :( ::

[schnorky]

hey guys somthing werid happiend to my skyline r33 gtst today it was driving fine all day filled up 20 bucks

then around 20 mins later i was sitting at the light and the revs droped almost stalled, i had to rev it a bit so it wouldnt stall

but at the next set of lights it was fine

bit confuzed i was thinking afm is goneskies but other then that not sure what it is...

it also did it somtime when i heavly pressed the gass at idle then backed off, the revs would go to 3000rpm

then when it came back down it fell to the point were the car was bout to stall

cheers for helping guys

[Hiney]

i'd try cleaning your AFM, and check that ur BOV wasn't leaking.

[Hiney]

** sorry, ignore the BOV part, yours isn't an atmo one **

[schnorky]

Cheers I'll do it after work does any one else have any advice?

[mosquitocoils]

Time to clean your AAC valve.

[shyr33]

My car used to do that and then I cleaned the AAC valve and it stopped doing it for quite a while. It has kind of come back now so maybe its time for another clean.

[payback21]

1. AFM faulty

2. Air sucking in somewhere between AFM and front of turbo. Check intake pipe between AFM and turbo. It will run like cop at idle and it will not idle. For all you know, the plumb back pipe to intake pipe between AFM and turbo may have come off. Its a bit hard to see all that when most intercooler piping covers alot of the turbo and intake pipe to the turbo. Check it out.

3. Throttle position sensor moved or stuffed

Try these first and get back to me.