Idle relearn questions ?

[Fmr12B]

Should the car be at normal operating temperature when this is done or should the car be cold?

 

 

Also, If I disconnect the battery to do maintenance is it neccessary I do the idle relearn?

 

 

Per the FAQ http://www.w-body.com/forum/viewtopic.php?t=31176

 

 

Thanks!

[1990lumina]

Personally, I'd do it after the car is warmed up....when you first start it up it typically idles higher.

 

and some people do have to do a relearn when disconnecting the battery, some don't for some reason. My car defiantely needs one after the battery is dosconnected

[gp90se]

I have never done an idle relean on any GM vehical I have worked on after disconnecting thr battery.

[Crazy K]

I think the truth of the matter is that the car will usually relearn the idle on it's own, but it does so better if you follow the recommended way of doing it rather than just driving it.

I've said before and I'll say again, if your car really shows signs of having to relearn it means that it has to make significant adjustmens, probably to compensate for very worn sensor that are close to the end of their service life.

[Guest TurboSedan]

i don't seem to have to do a relearn with mine either, but maybe that is because i have a manual transmission?

 

only time the idle got out of whack was when i changed the CTS. i just changed the CTS and the thing wanted to idle at 2000 RPM afterwards. i disconnected the battery for 5 minutes, then it idled normally again without doing any relearn.

[Pabz]

I only have to relearn mine if I disconnect the bat, then reconnect and drive right away. Usually ends up stalling when i let off the gas.

 

I think the best way is to connect the bat, let run till rad fan comes on. stop, let sit 5 mins, start again and run till fan comes on.

 

I dont like it learning idle in gear. but thats just my opinion.

[GnatGoSplat]

The only time you NEED to do a relearn is if something is slightly out of whack.

For example, the only car I ever had to follow the relearn procedure for, was an '88 Cutlass. This car would not even start the first time after disconnecting the battery. Without a relearn, it would die at every stop sign. Following the relearn procedure to the letter is the only thing that would get it to run right, and after relearn, it ran perfectly.

 

One day years later, I cleaned out its IAC real good. In fact, I even let it kick out the IAC pintle entirely and cleaned its threaded shaft, then oiled it with motor oil.

 

From that point on, that car was fine whether I performed the relearn procedure or not.

[skiiirt]

according to the GM tech at Nicholson Chev he says, start her up, drive to highway, drive for 15 mins and everything will be all good