how do I adjust the idle?

DJorgie76 · 03-27-2003

I know I should know this but what can I say.

How do I adjust the idle without it going back to where it wants to be?

KwikNotch · 03-27-2003

Clear the EEC-IV's idle memory by disconnecting the battery for 20+ minutes.
Disconnect the Idle air bypass solonoid
Reconnect battery
Start engine and set idle speed to desired RPM with stop screw on throttle body (900 rpm works great with E303 or larger cam)
Turn off engine and reconnect the air bypass solenoid
*Optional -- set TPS to 0.90 - 0.95 volts (Do not exceed 1.0 volts MAKE SURE!) Use a digital volt meter!
Start engine and let it idle for 2 minutes with no accessories on.
Turn off engine for two minutes
Start engine again and run for 2 minutes with every accessory turned on.
Turn engine off again.

Your computer should have now re-learned the new idle settings. This procedure assumes that you have a clean IAB valve. If it is carboned up then you may need to remove it and clean it with carburetor cleaner.

DJorgie76 · 03-30-2003

Quote:

Disconnect the Idle air bypass solonoid
Reconnect battery
Start engine and set idle speed to desired RPM with stop screw on throttle body

The idle air bypass solonoid is the silver tube like sensor on the tb that is mounted on an angle, right? That might sound dumb but I've tried this method before and when I disconnect that, the car will not start. It will just crank. Is there something else wrong

KwikNotch · 03-31-2003

There must be something else wrong, because thie IAB has nothing to do with the car starting. All it does is control the idle once the car is started(if it is connceted).

Doug

DJorgie76 · 03-31-2003

Am I disconnecting the right thing though. I just want to make sure. And if I am disconnecting the righ thing what could be the problem?

wagstdy · 03-31-2003

Disconnect the wires going to the Idle Air Valve. Don't remove the valve though.

To get it to start, try pushing in on the throttle a small amount to allow some air past the throttle body.

I've heard a good trick for resetting the computer is to disconnect BOTH battery cables from the battery and then touch them together. This eliminates the 20 minute waiting period.

DJorgie76 · 03-31-2003

Thank you for the help, but nobody has confirmed for me if I am disconnecting the right thing.

wagstdy · 03-31-2003

Sorry dude. Yep, it's that tube at an angle on the throttle body.

I'm guessing the car won't start because it isn't getting any air after you disconnect the valve. Try pushing the throttle down just a hair before cranking the engine.

DJorgie76 · 03-31-2003

Thank you very much for the help. I am going to try it tomorrow.

DJorgie76 · 04-02-2003

I finally got a chance to try to set my idle again. This time it worked when I gave it some gas as it was starting. After I set my idle I checked the TPS and it was way off. It was at something like 1.34 after setting the idle. Is that because I just changed the idle? Then I set it to .99 It runs alot better at idle and it seems to have helped the everlasting surging problem!