Car bogging down

chrysler

#1

My 2009 PT Cruiser has about 38800 miles on it and in the last two weeks, only when I turn my air on, it has started bogging down and missing when driving or idling…any ideas what would cause this??? Changed gas and that didn’t help


#2

Is the check engine light on?

At that age & mileage there really shouldn’t be anything causing it - which just means that anything related to how the engine runs could be doing it. The basics are fuel, air & spark.

If you have no check engine light, then the first thing I would do would be basic maintenance things. I would do those things because they a) do not involve a lot of time or money and b) are good to do no matter what. My basic list would include new fuel and air filters; an inspection of spark plugs & wires; cleaning of the throttle body, idle air control valve and mass airflow sensor (if so equipped). I don’t know the recommended plug replacement interval but if it was even close I’d just replace the plugs.

I would do all of those things and if it didn’t help I’d feel fine about it anyway since all of that is good basic maintenance. But I would then be thinking about getting it on a high-end scantool. The AC puts a hefty load on the engine and the computer is supposed to adjust for the load. Perhaps there is a communication problem in there.


#3

Plugs are due at 30k. That’s a good place to start.