R33 Cold Start Issues

[PagoRB25]

Hey guys
So every morning when i get into my car and start it, for the first few seconds (unless i rev it) my car coughs and splutters and occasionally stalls when its cold. No issues when warm. Im running a turbo RB25DET with warn out coils haha, what could be causing this?.
Cheers Alex

[PagoRB25]

Any ideas at all??

[DAN-33]

i got same problem, have to feather the throttle for 4-5 seconds before the auto chock kicks in and sits at 1600rpm.

Ive cleaned out the cold start valve under the inlet manifold, unsure where to go next

[PagoRB25]

Ah yeah I was thinking the same thing actually just unsure how to get to it, did cleaning the cold start valve work for you?

[GTSBoy]

There is also the idle control valve that needs to be cleaned. That's the valve that the ECU actually has control over, and if it is sticky, then control is slow.

[DAN-33]

nope didnt fix my Issue Alex,

Its under the plenum, 2 x 10mm bolts i think, and 2 hoses and a plug.

Mine was gunked up, it somewhat helped, but the car wont start without touching throttle unless its already warm, or been sitting in sun half day.

GTSboy, cleaned all that, that helped the idle alot as it was on 500rpm when warm, fixed all that, reset TPS position etc etc.

[PagoRB25]

Hmm alright thanks guys where is the idle control valve located? What else should I look at doing?

[DAN-33]

Search the DIY section, think there is a Right up with pics showing how to clean the ACC, its at the back of inlet manifold. 4 bolts i think, few hoses and clips.

Pull down, clean, put back on. easy. took me hour going slow.

[DAN-33]

http://www.skylinesaustralia.com/forums/topic/110431-diy-aac-valve-cleaning-idle-reset/?hl=%20acc%20%20clean

[marto184]

Also as a precaution get some throttle body and carby cleaner and wipe out the throttle body near the crossover pipe. I had some buildup of just "shit" in there. Affected my idle something chronic...

[GTSBoy]

That's not a precaution. That should be done at every service.

[marto184]

I meant as a fault finding thing lol. I agree though. very much so.

[PagoRB25]

Sweet as thanks everyone for the advice ill do each of these and advise you all on the results