Engine stalls while driving?

With the wires detached the engine should run at 500 rpm.

Roy

Got it.

It should idle with the IAC disconnected. It will be a low idle but still idle on its own.

Then when you plug the IAC back in, the idle should come up.

Roy

Okay, clean the throttle body real well.

https://www.2carpros.com/articles/throttle-actuator-service

Then adjust the base idle so it will idle on its own. There should be a base adjustment screw on the throttle body.

Roy

1. Disconnect idle speed control-air bypass solenoid.
2. With transmission in Neutral or Park, run engine at 2500 rpm/30 seconds.
3. Place automatic transmission in Park, manual transmission in Neutral.
4. Check/adjust idle rpm:
Turn the throttle plate stop screw to 725 rpm
5. Shut engine off and repeat Steps 2, 3 and 4.
6. Shut engine off and disconnect battery for a minimum of 5 minutes.
7. Engine off reconnect idle speed control-air bypass solenoid, verify the throttle is not stuck in the bore and linkage not preventing throttle from closing.
8. Start engine and stabilize for 2 minutes then goose engine and let it return to idle, lightly depress and release the accelerator. Let engine idle, if problem exists, refer to computer engine controls/diagnostic routines for other possible causes.

You need to adjust the base idle as I posted.

Roy

That stuff does not do squat.

Go to the parts store and get a can of 2+2 carburetor cleaner and a small brush.

That stuff works great.

Roy

Carburetor cleaner would better but give it a try. Carburetor cleaner is more aggressive and melts away all that carbon.

Roy

Check for any vacuum leaks. Check the PCV valve. Block it off with your finger and see if it idles steady.

https://www.2carpros.com/articles/engine-idles-too-high

Roy

Yes, it has one.

I posted the test for it below.

Roy

Start engine and bring to normal operating temperature.

Disconnect hose from remote air cleaner or air outlet tube (tube connecting mass air meter and throttle body).

Place a stiff piece of paper over the hose end. Wait one minute.

Does vacuum hold the paper in place?

Yes -- System is okay. Reconnect hose. Go to diagnostic routines for other possible causes of vehicle symptoms. See Power-train Management/Testing and Inspection/Diagnostic Routines.

No -- System is plugged or evaporative emission valve is leaking (if equipped). Go to PCV3. See: Positive Crankcase Ventilation > Pinpoint Tests > PCV 3 - Evaporative Emission System Check.

Good. Did you replace the hose that was leaking vacuum?

Replace the PCV valve.

I could not see anything on the scan tool. The camera cut off anything that showed.

Roy

Can you do another video and this time let me see the readings on the scan tool?

I need to see long term trim readings.

Roy