Engine stalls at idle and coming to a stop?

Has the check engine light come on? When you place it in gear, does it jump before stalling or just simply stall? These guides can help us fix it

https://www.2carpros.com/articles/stall-at-idle

and

https://www.2carpros.com/articles/idle-air-control-valve-service

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run down these guides and report back.

For a start check the idle air control motor/throttle position and manifold absolute pressure sensors-also the PCV and EGR valves.

Check for vacuum leaks and check the idle air control valve.

THe O2 sensor shouldn't prevent it from restarting. Have you ever checked to see if it getting spark and fuel when it doesn't start?

If you raise the idle just a little and put it in gear, does it kill the engine dead, or does it try to move? If it kills it dead, your torque convertor clutch could be locked up. Do you get a check engine light while the engine is running? Please advise.

What ever tripped your CE light will be stored in ECM memory. If you can have the computer scanned and retrieve whatever codes are stored, this could be a valuable clue(s) as to what's going on. Autozone will do a scan for free as well as many major parts stores. Let me know what you find.

Hello,

Well, it could be a couple things. First need to check a couple things. When is stalls and won't restart you will need to check to see if it is getting fuel. You will need a fuel pressure tester. If fuel pressure is fine the next thing to check is Spark, to do this you can use a philips head screw driver pull a plug wire off place the screw driver in the end then place it somewhere that it will be close within a quarter inch of a good ground and NOT the Battery Ground. Have someone try starting the vehicle. You should see a spark jump between the driver and the ground.

Post results here in the forum.

Your idle speed is almost completely reliant on a motor. An IAC motor. They fail, or need cleaning. It, the TPS and the blade(throttle) are mounted on the throttle body, your accelerator pedal cable is attached to it. Use a nylon brush(thin and small) with carb. Cleaner to clean out the blade, IAC motor, and their holes, see if it helps. You can do this yourself, or you may check to make sure you have the proper fuel pressure(at least 50lbs.), Ok Careful.

There are many possible causes, the throttle position is constantly looked at by the computer(PCM). If something goes wrong a fault code may be stored and later retrieved with an electronic scanner. Idle speed and fuel control are all done with motors and sensors. Both a faulty idle speed motor or a throttle position sensor could cause this. Bring it back to the place that the engine was overhauled at. Before it causes another problem. OK Joe

The engine recieves air through a fresh air system known as the air intake system.
Different cars use either a single air cleaner and plastic hose, bringing fresh air to the throttle body or some have different arrangements either factory or aftermarket made. The air filter sits in this just before the air enters the Throttle body, assuring fresh and filtered air is drawn in. All your cables that controls the idle speed are attached to the throttle body. It looks just like a smaller carburetor. The throttle position sensor is mounted on one side of the throttle body. The idle speed motor(IAC) or air idle control is also mounted on it. Just below the throttle blade. It moves in or out to give the engine a sort of a controlled vacuum leak, and the manifold absolute pressure sensor, senses the drop in vacuum, telling the computer to give the injector more gas. So both the TPS and the AIC are usually right on the throttle body, which houses the thrrottle blade. Just follow the accelerator cable and you will see it mounted right on the throttle body, near the TPS. It has 3 wires at least.
Clean it and clean the hole it came out of with carb. Cleaner and a small nylon brush.
I think that you may be hearing that loud screech coming from the alternator belt as you give it a load turning on accessories. Glad to help.