My friend has this same issue so far we've tried
1.)Cleaning TB
2.)rebuilding TB
3.)New ISC
4.)Replaced TB with one from a known good running car - **** see thoughts on this at bottom
5.)replaced coolant temp sensor to ECU (his was bad causing an overfueling because it was reporting a coolant temp of -40) this only solved it for the warmup period of the car.
6.) checked and blocked all vacum lines that connect to the TB to test for oneof them leaking
7.) Made sure there was slack in the cable at the intake manifold
8.) Cursed at the car repeatedly and drank beer to cope with the stress of the previous 7 steps of failure
*** Notes on # 4 ... since we replaced teh whole TB ( ISC AND ALL) with one from a car known to idle good, i think that for some of you the problem does not lie in the throttle body but in some other part of the intake system or in the ECU it's self.
The things the owner hasn't tried that i keep telling him to do
1.) Plug off EVERY vacum line one at a time (including brake booster) to determine if the extra air is entering through some other un-found source
2.)Stop f&^%ing with the cooling system and concentrate on the first thing i said to do and that's # 1 above :P.
He thinks because it doesn't do it when cold that if he can make the motor run colder all the time he will get a lower idle (i don't get this, he's a smart guy but some of stuff he thinks will work is just plain "silly"
to be nice about it ) I told him this would only be a band-aid if it did work, but he still want to try adn make it run cooler...not the answer IMO
Anyone ever found a bad brake booster on a DSM to do this same thing? I've seen it on some older V8 cars, but never on an import.
Either way, my point is i think we need to stop staring at the TB like something magical is going to happen to it and start looking in other places, if you took your car to the dealer for this they would have to get it fixed, and this would probably involve the use of OEM parts, NOT blocking off the FIAV (which i still don't understand why so many people do instead of just fixing what's wrong int he first place...with the exception of those who actually are doing it to get the HOT coolant away from their TB and drop those extra few ounces of weight that's needed in serious competition) but there's no reason your avrage jow should have to block off the FIAV just to get a normal idle, it just aint right i tell ya
Resolved
i happened to find it by luck tho. okay heres the story. took my car up to the local car wash. started idling high. go fig. so i came home and it was idling at 2300k. i popped the hood and jus looked at it for a min in disbelief. so i was looking it over and i happened to put my hand on the metal jacket that the cable goes through to the throttle body and, the idle immediately dropped! i was like woo hoo! then i got pissed ### of all that time i f'd with it and the embarassment i went through pulling up to stop lights and having people jus look at me like im an ass ### im holding the throttle. i want to give all ya'll a big thanx for helping me out!!!!
