Ok, when i first start it when it hasnt been ran all night or all day, it idles fairly high and normal, about 1800 rpms, somtimes it will sky rocket to 2800 but not often. But almost everytime it gets warmed up and idles its like barley hanging on at about 300-400 rpms. Its terrible, but wierd thing is, somtimes when you drive it around abit it doesnt do it anymore, but will randomly come back. i was thinking the idle air control thing, but i cant find it, alls i see is a diaphragm on the front of the throttle body, how are you suppose to get to it, a picture would be awsome, i really need to solve this. And where exactly is the coolant temp sensor for the ECU, i see one coming off the Thermostat housing with a black connector too it, im not sure if thats it or not

the coolant temp sensor is on the top of the block, off to the right of the turbo. the connector is rectangular, and the hex part is either 17 or 19mm. i think the thing youre talking about on top of the thermostat is the idle air control.

There's a picture of all the SPFI parts from GeneralDisorder here:

http://www.ultimatesubaru.org/forum/showthread.php?t=66953

 

They are discussing carbs, ignore the subject and scan down to the picture of parts on a blue table.

 

In the top center you'll see the throttle body. If you picture that in your car, the idle air control valve is attached to the throttle body, located just behind the power steering pump. In the picture it's just above and to the right of the fuel filter. It has an electrical connector and 4 screws holding it on. Use a pair of pliers instead of a screwdriver to remove those screws and you can take it apart and clean it out.

Yeah.... but he has a turbo car, so the SPFI picture won't really help him. He doesn't have an IAC like that.... I'm not sure what the MPFI's have, but it's different.

 

GD

Oops - missed that!

ok its defintly the Coolant temp sensor, i unplugged it and the idle went normal, but threw an ECS light. THe connectors are both really corroded, how do i clean such small connectors, especially the female side

so how do you guys clean the connectors?

I hear of people cleaning thier contacts on the sensors all the time, so how is it done?

I believe they like to cut off the connector, if it's all corroded, and

solder the wires directly to the sensor. Or there is a generic connector

that fits it, I think it was a connector for Bosch fuel injectors or something.

Rallyruss had a part number for it somewhere. I'll see if I can find the old

thread.

 

Here it is - http://www.ultimatesubaru.org/forum/showthread.php?t=48690&highlight=Coolant+temp

 

I used some electronics cleaner and a small piece of sandpaper to clean mine off.

sandpaper, file, emery cloth, dremel tool, bench grinder, nitric acid (this one's fun!!) all work well. I cannot recall exactly what type of connector is used on this sensor, but if its a bullet connector the males would be easily cleaned by taking a small, but long and skinny strip of sandpaper or emery cloth (3" x 1/2" or so) and holding both ends of it, wrap it one-half way around the bullet.. like a U.. and pull the paper back and forth. rotate your U to get all the way around. the female connector is the reason most people like to solder it. crimp connectors are just as bad as terminal plugs, and you cant check or clean the crimp.

awsome! thanks a ton!