If question to me, no it did not. I think @Axxe55 found this on internet as possible source to try.
Any mechanics that can help...high idle
- Thread starter cvgunman
- Start date
The #1 community for Gun Owners in Texas
Member Benefits:
Fewer Ads! Discuss all aspects of firearm ownership Discuss anti-gun legislation Buy, sell, and trade in the classified section Chat with Local gun shops, ranges, trainers & other businesses Discover free outdoor shooting areas View up to date on firearm-related events Share photos & video with other members ...and so much more!
Member Benefits:
Axxe55
Retiretgtshit stirrer
Personally, I have mixed results with various methods. Some only seemed to work if the Tech 2 scan tool was used.
Axxe55
Retiretgtshit stirrer
Red Army is correct. If the quick and simple methods didn't work, A GM technician is going to have to hook the scan tool to relearn it. The can also check to see if there is an updated software package for the ECM as well.
Try a local mechanic, it shouldn't cost you much and they'll be able to do it quickly if they're not too busy. I'd try to avoid a GM dealership, most good shops will have that tool. Avoid chain shops like Firestone etc. unless you happen to know they have a good mech.
I'm going to check out 3 sources. Neighbor around the corner is former mechanic, but think he's on vacation. Going to walk the dog around the block and check. Guy across the street had mobile mechanic come to him a couple of weeks ago. Going to get his number and find out his fee and if he can do it. Lastly, I will drive it to a small shop a few miles away and see if they can do it (after calling of course). I hate cranking the engine over and having it hit those high rpm's while cold. Prefer if I can get someone reasonable to come to me.
Thanks for all the tips/info. Was hoping @TexMex247 would chime in
The one they have will just read the codes. The one needed has the ability to manipulate the ECM (computer) to reset the idle and throttle. Had thought about buying one, but don't have the necessary 4-5K lying around. If I did, sure would get a nice thermal instead
Well. Dangit!The one they have will just read the codes. The one needed has the ability to manipulate the ECM (computer) to reset the idle and throttle. Had thought about buying one, but don't have the necessary 4-5K lying around. If I did, sure would get a nice thermal instead
Did you disconnect the battery while you did all this? Check all connections?
Yes.
There was almost 1/16th inch of carbon built up in the throttle body/butterfly valve. When cleaned it threw of all the metrics and appears it needs to be manually reset.
Axxe55
Retiretgtshit stirrer
The one they have will just read the codes. The one needed has the ability to manipulate the ECM (computer) to reset the idle and throttle. Had thought about buying one, but don't have the necessary 4-5K lying around. If I did, sure would get a nice thermal instead
Then they just have the glorified code reader scan tool. You need the "bi-directional" scan tool that can change different parameters within the ECM.
As Red Army mentioned, most decent auto repair shops should have one. Snap-On, Matco and Mac tools carry them. My brother has the older Snap-On scan tool at his shop.
Road trip!
Axxe55
Retiretgtshit stirrer
Problem is, since he started specializing in auto electrics years ago, it hasn't been used or updated with new software. He may have even gotten rid of the thing for all I know.
Well I would start with a hard reset, which is disconnecting both terminals and holding the negative and positive terminals together for at least 10 seconds. Neither touching the battery itself.
Also, it truly would never hurt to pull codes. You very well could have a vacuum leak. Last option would be a snap on or other scan tool with the relearn option .
Also, it truly would never hurt to pull codes. You very well could have a vacuum leak. Last option would be a snap on or other scan tool with the relearn option .
Last edited:
I will give the hard reset a try. I only disconnected the negative throughout. Will pull them both.
Keep you posted if any change.
Cheapest tool with throttle body relearn is $235.00. I would advise against buying one unless you plan to use this tool regularly. It's even possible that the tool won't work with your truck. Make a few phone calls to local shops and I'll bet you'll be on your way for less than the price of the tool. There could also be other unknown factors involved since none of us are actually looking at cvgunman's car in person. I'm going with the manual throttle body relearn being required. Those old ECM's are pretty clunky compared to todays electronics.
