1999 Camaro Z28 m6. About 5 or 6 times now on the initial cold start the iac goes to 0 and is commanded to 0. As you can imagine, the car has not hope of running after the initial fire if the iac is on 0....especially on a cold morning.
Yesterday before leaving the shop the car was completely cold and it fired up perfectly with the iac on just over 200 counts and trimming down as it should as the car warmed.
This morning, the car went right back to 0 with key on. When turning the key off and the log still rolling you can see the iac open back up. Key back on it goes back to 0. I did this quite a few times in the log im attaching so that you can see. Every time the iac goes to 0 it is because I have keyed back on.
Any thoughts? This problem is another new one on me....and the fact that it only does it sometimes is very strange and the fact that the iac works as commanded makes it even stranger. What in the programming would tell the iac to go to 0 with the key on and a cold start?