2000 Chevrolet Tracker Q&A

2000 Chevrolet Tracker Question: 2000 Tracker I changed the battery, now the engine won't idle.

I recall this happened last time I removed battery cables for cleaning and then the engine wouldn't idle, then after some time it would idle, I dont recall what fixed it, I'm sure a component or sensor needs to reset, any help would be appreciated. -
Answer 1
you should take it to the dealer to have the pcm reprogrammed -
Answer 2
Have someone hold open the throttle and clean inside the throttle body with some throttle cleaner and a tooth brush. reassemble, start vehicle and let idle for around 5 min. Drive vehicle and see if it's now ok. For future reference you should always have a battery backup installed when disconnecting the battery. On this vehicle the idle learn is really all that is lost but on newer vehicles there is a lot of reinitializing that will need to happen after a battery disconnect, trans shift points, windows, & doors, come to mind at this point but I know there is more. -
Comment 1
Thank you, good info, I started it cold without any throttle and it idled fine, let it come up to full temp before driving, it's ok now. -