2.3L ('83-'97) Relearn Procedure

[Sudo]

What is the best/propper relearn procedure after changing the IAC (Manuell Transmission)?

 

[franklin2]

Drive it for a couple of days. The computer constantly relearns and makes adjustments. When you make a change, you just have to wait on it and go through several drive cycles.

If you want to start completely over, pull the battery cable off for a minute or two, and then hook it back up and drive it for a couple of days. It will have to relearn many different things when you pull the battery cable off.

 

[Sudo]

That's what I'll do today. I had the Batterycables all night jumped. The Comp should be clear now ......

 

[Sudo]

Here is what I did : I jumped the + and - Cables from the Battery ( after disconecting the negative clamp from Battery) over night. ( I have a Manual 5 Speed)
Then i started the engine and she was going to shut off. I did read something, somewhere, that we should not touch the gas pedal in the beginning of the relearning process. It said just let it idle. I kept that in mind. NOT TO TOUCH THE GASPEDAL. I started the engine and she was going to die. I was attempted to step on the gas, but I didn't . I let the engine die. I then restarted the engine after the Airbag light shut of ( i waited every time until the Airbag light shut of before I restarted) . All together about 20 times did I restart the engine. Everytime the Engine started to stal and I was really attempted to step on the gas , but I didn't. What I realized was, the engine run better and better , every time I started . After about 20 Restarts, the engine stayed on. Not a single time did I steped on the Gas . (It is hard not to step on it, because......that's what we do when the engine stalls.) Then, after the engine was warm, I drove around 60 Miles on winding Roads , so that the Computer had a lot of shifting to learn. I got the Truck like 4 weeks ago and it run the best since I got the Truck. After the Engine cooled down, I started again, but the rough Idling is back. I've to fix 2 more vacuum hoses . When I got the Truck, the Seller told me, he installed a new IAC. No markings on the IAC. No number or maker Name. So i got a Dephie IAC from Amazone and installed it before I did the relearn process. But, I'll take the IAC, that I took out , and put it back in and try my way of relearning the Comp. I'm sure it will work with any after market IAC. Just don't step on the Gas untill you are ready to drive. I know it's hard, just tape your right leg with Ductape to the Shifter....lol


You know, they always talk about .......RELEARNING..........that does not happend in a Minute or so. Here is my thinking about it. When we put the new IAC in, the Computer has to start adjusting that Valve that we see before we install the IAC. Many times i read, but it's open and doesn't close all the way. The Delphi looked like that too. But I'm sure when we start relearning the Comp, the Comp will adjust the Valve untill it is in the right Position. To do that, that Comp try's multiple setup's untill it reaches the right set point and that takes a few minutes. Because the Comp is adjusting the Valve, we can not step on it and we have to let the comp figure it out on his own. Just make sure your Battery is fuely charged. I didn't do any of the "Learning Modes" with AC On and Off or the First Gear thingy. I check the Owner Manuell what it says about, what to do after the BAttery is changed. I simply followed the guidance in the manual. The Manuel is probaly the best way to figure out what to do with your specific Car, because I've read about 12 different Version's on how to relearn the Comp. So I came up with my own, the 13th Version.....lol

 

[franklin2]

It sounds like it is relearning, but you may be requiring it to go to college. The idle settings may be so far off, it has to really compensate a lot to make the engine idle. There are minimum air requirements for idle.

The first thing I would do is pull the hose off the throttle body and clean around the throttle blade. Open it wide open (engine off) and take some brake cleaner on a rag and wipe all around the edges of the throttle blade and around the throat of the throttle opening. Get all that sticky black stuff out of there.

Then put it back together and get the engine running and warmed up. After it's fully warmed up with a clean throttle body, with the engine idling pull the wiring plug off the IAC. See what the engine does. This is your minimum air. With no vacuum leaks, and the throttle body clean, when you pull the wiring plug off, the engine should slow, but not stall. It should keep barely running.

If it stalls, mark the idle stop screw and then turn it in a little bit till the engine barely idles with the wiring plug undone. Once you get that plug it back in. THEN do your relearn procedure, it should not stall after this.

 

[SenorNoob]

Mine won't stall but takes a couple weeks to get a smooth, consistent idle sped after unhooking the battery.