So i didn't sit here and look thru the possible 100's of 'idle problem' threads.
I'm kinda frustrated at this point.

It's an '04 Cav 5spd with 107K miles with a warm air intake.
I dont really use the a/c much but lately i've been using it cuz its been extra humid lately so i dont know if this is a cause or a part of the problem.

So my problem is that i'll turn the a/c on and use it for like 20mins, then turn it off. I'll come to a stop and the idle will be high. I cant think off the top of my head where it sits normally, but it's been up close to 2K rpms or a little higher lately.
It's always done this every now and then when i use the a/c, but it usually goes away after sitting for about a minute or with a quick rev of the engine. But lately it hasn't.
Today i was sitting in traffic at lights and the idle was jumping bewtween 700-900rpms for no reason. Then on the way home it was so high that it drove me through downtown on it's own doing the 25mph speed limit and the cruise was off and my feet weren't near the pedal while i was in 3rd gear/

I just need to know if i got to go and spend my money on getting this thing looked at by somebody or replacing parts or if its just somthing that seasy to change or fix. Boyfriend says it could be a cylinder going but he knows more about boats then cars so he doesn't really know.

We disconnected the battery and let it sit for 5 min and started it back up when we got home and the car was fine then, but i dont know if it will come back or not. Its not throwing a check engine code and nothing is flashing on the dash.
And kind of help would be appreciated. I'm sorry if i make no sence, its late for me and im really tired. Thanks for any feedback.





RIP JessE -- You are not forgotten! | FaceBook | G+

Idle Air Control Motor???possibly..mine did this for a wekk or so, dealership replace the IAC and nothing since...

Vaccum issue....Not sure....

IAC valve is my guess too. My eco idles low from time to time and i suspect its my IAC, cuz it running it hard and reving cures the problem temp. I would go to the dealer and pick one up, it'll only take 5 minutes to swap out by yourself.

BTW the only reason i would suspect a cylinder is dying is that your getting a loss in power and compression.

Ok sounds easy enough, anyone know about how much one usually runs?
Getting one out of a junk yard car would probably be a bad idea tho, huh? Not like i can find any eco's around anyways!



RIP JessE -- You are not forgotten! | FaceBook | G+

also if you get a chance, go by auto zone or advance auto parts, or what ever your local parts store is that has a real time engine data acquisition and see what the TPS sensor is reading...

thomas

IACs arent cheap, I would test dont guess


- 2004 Cavalier - 124k, owned since new

nope like 600 something for mine...thank the guy above for warrenties...lol

What?!?! Thats ridiculous. Looks like i'll clean up the one in my spare TB and try that.


Rob - What would be the proper way to test it? For the life of me i cant think of a way to.



Edited 1 time(s). Last edited Tuesday, June 10, 2008 8:17 AM

Ok, i'll look into getting a new one. I'll try hittin up auto zone and see what they say.

So this had nothing to do with my a/c? Or do i need to get that looked at as well? Made a hissing sound and went warm for a day then went back to normal. Maybe just need a recharge?



RIP JessE -- You are not forgotten! | FaceBook | G+

Hey! Nobody's going to mention the GM Tech-bulletin on this issue, explicitly covering J-bodys with the ecotec and the manua transmission made in '04? I know you said "I don't want to search....", but do. Narrow it with the word manual or something. There is a specific GM service bulletin (not recall) covering this. There are also specific postings on this site covering the issue. Its a coding problem in the ECU and needs a reflash from a GM Tech-II tool. I would check that out first though, before throwing parts at the problem.

How about a link to the said TSB?


Also i stopped at my local GM dealer, $130 for the IAC valve.


New sig on the way.

Jimbo234 wrote:Hey! Nobody's going to mention the GM Tech-bulletin on this issue, explicitly covering J-bodys with the ecotec and the manua transmission made in '04? I know you said "I don't want to search....", but do. Narrow it with the word manual or something. There is a specific GM service bulletin (not recall) covering this. There are also specific postings on this site covering the issue. Its a coding problem in the ECU and needs a reflash from a GM Tech-II tool. I would check that out first though, before throwing parts at the problem.

I need to look into this as well. Mine has always had an off and on weird idle issue usually invovling changes after very slight engine loads (idle in second gear for a while , mash the clutch in and revs shoot to 3k, or about 4 times i have had the car shut off right as engine coolant went to around 195 degrees and i am using the a/c.

It always does the slight load thing. Put your car in 2nd or 3rd, let it idle up and slight incline. get to the top and mash the clutch and it just revs up. A blip of the throtle fixes it. The engine cutting off has happened maybe 5 times in the last 50k miles, so I do not worry about it as much, but it is still annoying.



2004 Cavalier. Razzi. (Sold)
1998 Corvette. Some mods.
1992 Typhoon. Lots of mods.
1994 Civic VX 44MPG

"Idle Flare or Decel Stall
This condition may affect 2002-04 vehicles with 4 cylinder 2.2L engine
(VIN F - RPO L61) (Chevrolet Malibu, Cavalier, and Classic, Oldsmobile Alero, Pontiac Grand Am and Sunfire).
Some owners may comment about an engine idle flare when the clutch is depressed. Also, some owners may comment about a low speed engine decel stall when coming to a stop.
The flare is caused by the vehicle entering stall-saver mode when the clutch is depressed. The low speed engine decel stall is produced by an interaction between the engine control software and the IAC motor.
Reprogram the PCM with the latest calibration available. The new calibration was released beginning with TIS satellite data update version 6.0 for 2004 available June 2004. As always make sure your Tech 2 is updated with the latest software version."


This is copied from an earlier discussion(search for eco idle).

Ok. I'll still swap out my IAC(since i do have an extra laying around). If that doesnt work, its off to the stealership. Hopefully they will use lube.

Jimbo234 wrote:"Idle Flare or Decel Stall
This condition may affect 2002-04 vehicles with 4 cylinder 2.2L engine
(VIN F - RPO L61) (Chevrolet Malibu, Cavalier, and Classic, Oldsmobile Alero, Pontiac Grand Am and Sunfire).
Some owners may comment about an engine idle flare when the clutch is depressed. Also, some owners may comment about a low speed engine decel stall when coming to a stop.
The flare is caused by the vehicle entering stall-saver mode when the clutch is depressed. The low speed engine decel stall is produced by an interaction between the engine control software and the IAC motor.
Reprogram the PCM with the latest calibration available. The new calibration was released beginning with TIS satellite data update version 6.0 for 2004 available June 2004. As always make sure your Tech 2 is updated with the latest software version."


This is copied from an earlier discussion(search for eco idle).

That's pretty much what my car does, guess i'll have to be like Tinkles and find out how much it's gunna cost to fix theyre screw up!



RIP JessE -- You are not forgotten! | FaceBook | G+

if not jes theres 2 ecos at my local yard i could yank parts from. let me know.