Ruddell
Member
I recently installed a new IAC on one Ty (GM 17112193) and was still left with no idle. Long story short, I bought another one and it's been running fine ever since. So the thing was clearly defective. The first one I installed had no sound coming from it with the key up. The second one had a nice humming sound. And this is the one that ended up working.
I did follow the reset instructions. Ground A&B with key on, wait 30 seconds, unplug IAC. Key down, unground terminal. Start truck. Shut off truck. Plug IAC back in.
So my other Ty also has a stalling and no start issue. It has good fuel pressure and spark. I put in a new Ac Delco ICM. Next I decided to go ahead and put in a fresh IAC. I installed it and got to the point where I did the reset steps, the IAC was making a humming sound, and it started up and ran for two minutes then shut off. It will not start again.
I noticed the IAC is now making a very faint click type sound deep within. What's that about? I plugged in two other ones and it does the same thing. I am very confused. Are they all defective?
Another thing i noticed is when I ground the terminals, it is not giving me the check engine light. What could cause this?
Thanks in advance.
I did follow the reset instructions. Ground A&B with key on, wait 30 seconds, unplug IAC. Key down, unground terminal. Start truck. Shut off truck. Plug IAC back in.
So my other Ty also has a stalling and no start issue. It has good fuel pressure and spark. I put in a new Ac Delco ICM. Next I decided to go ahead and put in a fresh IAC. I installed it and got to the point where I did the reset steps, the IAC was making a humming sound, and it started up and ran for two minutes then shut off. It will not start again.
I noticed the IAC is now making a very faint click type sound deep within. What's that about? I plugged in two other ones and it does the same thing. I am very confused. Are they all defective?
Another thing i noticed is when I ground the terminals, it is not giving me the check engine light. What could cause this?
Thanks in advance.