Tanispyre

I am liking this Idle control value being gummed up idea. The problem started right after having the engine pulled to replace the clutch. The first time I took it back to the mechanics who did the clutch, both the warm and cold idle were off, they said that they cleaned out the throttle area, which did seem to fix the warm idle problem. Any suggestions on where to read about the IAC? I will start by googleing it. I will update with my results.

Replaced the spark plug cables and spark plugs, the #4 cylinder cable had some cooked on coolent so i though that might have been the problem as the above suggestions have lead. While the warm engine idle is smoother, the cold engine idle is still extremely high. So I think I can rule out the spark plugs and cables

Interesting idea, I have pulled the spark pugs to look for build up as a sign that it is running to rich, but my multimeter had dead batteries so I did not check the cables. I will look into that and get back to you.

This is very different from the normal cold engine idle speed. 2000 rpm is about right for the cold idle speed. When I start my car and start driving it, the car idles at almost double what it should normally idle at for a cold idle. The fact that the rpm changes as the car warms up is not a problem, that just means that the thermostat is working and adjusting the throttle like it is supposed to. This extremely high idle speed makes shifting when the engine is cold very difficult, and puts a lot of extra wear on the engine components, as I can smell hot rubber when I get stopped for a while at a stop light

Techron is the cleaning formula used in Chevron fuels, it is often also sold as a fuel additive. Look for a fuel system cleaner made by Chevron, that should be the techron additive.

I have the same symptoms on my 1991 legacy turbo, for me, I have it happen more often when I clutch at the same time I am have to brake hard. I ususally just stick my toe under it and pop it back up. But it seems to work fine when it is stuck in the down position with its 3 inches of play. I dont get any slippage of the clutch.

I have a 1991 Subaru Legacy with a 2.2L Turbo engine and a 5-speed manual transmission. I am having a problem with the cold idle speed. When I start the car with the engine cold, it idles rough (at about 1200 - 1500 rpm), it also seems to produce no power as even the slightest engaging of the clutch causes it to stall, until I rev the engine. After I rev up the engine the idle speed rises to between 3000 and 4000 RPMs and stays there, Once the engine temperature starts to rise the RPMs start dropping, when the engine is fully warmed up, it idles at about 600 rpm. The check engine light is not on. I have taken it to a couple of mechanics they check the computer to see if it gives any errors but it does not, at this point they say they don't know what the problem is and can't fix it. The problem first appeared after I had the clutch replaced in the car. I have taken it back to them several times to try and fix it but they have been unable. I had some other work done at a subaru dealership and asked them about it, but they were not able to find anything wrong either. Do you have any suggestions on things to check to try and identify the source of the problem?