Q: Car chugs when AC is on at a stoplight - 2005 Chrysler PT Cruiser

asked by on

When I have my AC on and I am stopped at a light or cross road for several seconds the car starts to chug and shimmy. It stops as soon as I turn off the AC

My car has 54000 miles.
My car has an automatic transmission.

Hello - there may be a problem with your idle air control valve. Its job is to bump up engine idle when there is an additional load on the engine, such as the AC compressor. Other possibilities include a dirty throttle body, air leak in the intake, or other problem causing a rough engine idle. I would recommend an engine inspection of these systems by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car chugs when AC is on at a stoplight - 2005 Chrysler PT Cruiser

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Window not going back up

The cause of your window not moving is either a faulty window motor, or faulty regulator. If you hear a noise when you try to move the window, then the regulator is broken. If you do not hear any noise,...

Q: I have a 2004 Chrysler PT Cruiser turbo. The car starts right up, but after a few seconds starts to lose power and want to die unt

It is not clear if the poor engine operation you were experiencing is somehow linked to the present no start condition. In any event, before the engine can be diagnosed, it has to be running and so that is the...

Q: Multiple leaking parts

CV axles leak from the a dust boot. Inside the dust boot is a special high temperature grease that provides lubrication to the joint. If the grease leaks, the joint will be damaged from the lack of lubrication and extreme...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...