When cleaning my IAC valve, the Pintle and spring fell out

Or since it is an older car I do not have to relearn it?

I know there is a relearn process for when replacing an IAC control valve, but I came across an older Buick Dealer Service Bulletin from 1988 regarding the 2.8L V6 Engine Base Idle RPM Adjustment for the Idle Air Control Valve relearn process.

Buick stated that all 2.8L MPFI V-6 Engine calibrations for 1988 and 1987 service include a feature which stores in ECM memory the Idle Air Control Valve (IAC) Position at which the engine idles. Each vehicle will have a unique value, depending on the throttle body base air rate setting, deposit build up, etc. The IAC position information is continuously updated, during vehicle start operation, and stored in the ECM "keep alive memory when the engine is turned off. If the ECM is without battery power for any reason, then the IAC position information for a stable engine idle is lost and is replaced with a default value.

Buick than said to correct IAC position information due to a disconnected battery power and improve engine idle, you must perform the relearn procedure for the Idle Air Control Valve to work properly with smooth idle.

I have never knew you could do this before. So my point is do you have to do this procedure every time when you disconnect the battery or get a new battery to improve engine idle? Also, can this service process by Buick be done with 2.8L V-6 engines for the 1989 Model year as well? Such as if Buick says you do not need to perform this process for the 1988's and 1987's can it be done with the 1989's as well since it has the same displacement engine or did they change it? All the throttle body's worked the same way for all interchangeable 1988-1991 models that had this type of throttle body used.

If I can save myself some time by not disconnecting the battery when putting the new IAC this would save a lot of time. But I want to make sure I do not damage my engine. They said a base idle rpm adjustment is not required and should not be performed on 1988 Vehicles. Like I said above can this be matched with 1989 vehicles as well?

So there is not a need to do that process above you listed? Or for the first time since it is new sensor I need to for better idle?

Oh okay, thank you. Got side tracked to as what Buick meant when they said you did not need to relearn anything without connecting battery.

New one came into today. Can you tell me how to extend the pintle out further in the new one to look like the older one?

Pintle is not even in the housing because it is not extended out.

I actually do not have an idea how to do that. I thought the ECM would extend the pintle and spring. The directions on the IAC relearn said do not extend it because it could damage the part.

After that it will not stall months later would it? The idle will be adjusted after it is driven right?