Weird cold idling problem.

[Createdtoburn]

So I have a AE92 4A-GE, and basically, when I start my car up in the morning, it always idles up to about 2500 rpm, then after it begins to warm up after like 5 minutes at least it will slowly start to drop down to normal as it gets warmer. I know it's normal to idle a little bit higher until its warm, but 2500 rpm is way too high, more like 1200 would be acceptable.

Is there any way I can fix this, or adjust it maybe? Any help appreciated. thanks.

[Croatian_AE92]

did you adjusted the throttle screw on the intake manifold? Mines all the way down and it does the same thing. I think its a combination of age and probably a vacuum leak some wheres.

[Createdtoburn]

Hmm well I'll try that. Where exactly on the intake manifold is the screw located? Near the TB? Or is it that spot right in the middle in visable sight?

[Croatian_AE92]

Mine was at the right top hand corner.

[REN69]

They all idle high... change your thermostat and see if that does anything.

[Createdtoburn]

Man I'm really not sure where that idle screw is. All I see is the two bolts that seems to adjust the throttle cable tightness, is that it?

[REN69]

No, there's a small black round cap on top of the manifold on the corner closest to the intake pipe, take it off and its right there.

[Createdtoburn]

Ahh thanks. Found it now. I idled it down from 1000 to 800 rpm. This might help my cold start idle problem a little bit, but I dont think it will quite fix it. I'll have to wait till later to find out once the engine cools down.

[Duy-]

ive heard of mr2's having the same problem and is fixed by replacing the cold start unit but to be honest... ive never had a 4age that didnt idle around 2000 cold

[Createdtoburn]

Thats so weird. When I used to have a 92 celica with the 4AFE engine it only idled like 1200 rpm at max cold, then dropped to 800 rpm. Thing ran great.

[** ~~ {{ Bando }} ~~]

mine does it every time...its normal 2 me..and i live in a variant climate..cold mornings and nights...hot midays