AC/Issue

My 2002 dies when you turn on the air. You can hear the engine come under load then the idle starts cutting out and it dies. Turn off the air and it is fine.

HELP!

Try disconnecting the AC clutch wire then turn the AC switch on to determine whether it's a mechanical or electrical problem.

The idle seems a little low and when I turn on the ac it just stalls the car. Is there a sensor the controls idle? Could a PCV Valve cause this.
I don't think it is the AC Clutch.

If the AC will stall the engine because of a stuck idle air control valve (IAC) then putting the trans in any gear should stall the engine too.

The compresser is putting out cold air. and the pully is turning. I am at a complete loss

Does the engine stall when you put the transmission in Drive or Reverse with the air conditioner OFF?

No it runs fine w/the air off.. If I am on the freeway I can turn the airon and car is fine. Pull up to alight low rpm it dies .

Sorry, I can't find any pics. Is there a device mounted on the throttle body that has a wire or wires going to it?

There is a plastic cover on the drivers side cover right on top is a sensor or something with a plug. Do you know where we could get a picture.

Sorry, I can't find any pics. Is there a device mounted on the throttle body that has a wire or wires going to it?

Yes it is right on the top by that plastic cover.

Wow, really hate to mess anything up. Besides getting a manual for your '02 at the local parts store, maybe a Pro will see this and respond.

What is the sensor called can GM help? Is it easy to change?

On earlier engines they were called an Idle Air Control valve (IAC).

On earlier engines they were called an Idle Air Control valve (IAC).

GM says you have to peplace the entire throttle body. It is not servicable.

Any ideas?

Could it be the MAP sensor?

You might try removeing the throttle body from the plenum, remove the IAC from the throttle body, and clean the pintle, the seat, and the entire passage with throttle body cleaner. Don't push or pull on the pintle valve stem or it may be damaged. Carbon deposits normally formed by the EGR system tend to clog the passages for the IAC. BTW, the IAC is serviceable separately. Most auto parts stores carry the them in stock.