R33gtst Idling Problem

[Thelen]

So starting the car up in the morning, even on total cold close to freezing mornings, it will idle fine at the 750rpm or whatever.

But after driving it around for long enough that it warms up (5-15mins), starting the car again after like 30 minutes (time for some parts to cool down), it doesn't idle very nicely for about a minute till it warms up again.

I'm guessing something is cooling down or staying hot, and being different temperature to what the ECU expects, so the ECU isn't running on the right setting.

It will drive perfectly fine, it is just the idle that is a little sick. Oh, and it will drop to like 300-400rpm, then back to 750ish, about every 3-5 seconds or so. If you put foot on accelerator and hold it at like 1200rpm or more, for about 30 seconds then it seems to be warm up enough that it is fine.

Any ideas?

[Jaysiin]

i have a similar problem...

after changing my timing belt to a gates one, the car struggles on idle. let me explain...

i believe my belt is done up too tight. (someone correct me if im wrong)

first cold start, will rev low, struggling to stay alive, belt is cold, and the motor is working hard to keep the engine alive.

once the engine warms up, belt is slightly loosen and warm, and the idle returns back to normal.

i adjusted the aac valve on cold start to keep the engine running normal under 1000rpm, but once the belt is warm, my idles revs is high above 1000rpm.

but i suggest playing with yr aac valve and seeing how that goes, if not. there is something you might wanna dig deeper? afm clean? plugs? etc

Edited April 10, 2010 by Jaysiin

[Thelen]

Well you seem to have the opposite problem, or at least the other side of the coin. We both seem OK once it is warm, but I have no trouble starting from cold cold, only when starting after driving it