I tried to set my minimum idle today and when the iac is plugged in the idle is good when i unplug it the idle shots to 1500 and the throttle screw isnt even touching the lever.does anybody have an idea why this would be.thanks

 

did you groud out the aldl port for 30 seconds before you unplugged it?

 

yeah i grounded it out listned to the fans and iac run for a minute,started it up unplugged the iac and the idle shot up. the trans tv cable was pushed all the way in at the time but would that matter?

 

you didn't do the procedure quite right. ground out the aldl, put in run for 30 seconds, unplug iac, remove the jumper on the aldl, then start the car. im not how sure it is, but i've heard that problems can occur when you start the car with the aldl grounded.

 

I ungrounded the aldl brfore i started it.

 

This works for me.

1. Ground diagnostic terminal, turn ignition on, but do not start engine.
2. Wait 45 seconds for IAC to fully seat, then with ignition still on disconnect IAC connector.
3. Disconnect the distributor set timing connector.
   
   FYI: Idle can't be set if the ECM is in control of the timing.
   
4. Start engine and allow engine to go into "Closed Loop".
5. Remove ground from diagnostic terminal.
6. Adjust idle speed to specifications using throttle stop screw.
7. Turn ignition off and reconnect IAC connector.
8. Adjust TPS voltage if necessary.
9. Start engine and check for proper idle operation.

 

I know i didnt disconnect the ignition advance plug when i set idle, ill try the procedure yu got posted and lyk,thanks alot everyone for helpin out

 

i need to do this also...good info!