Edmunds Answers

Voted Best Answer

  • avatar zaken1 09/14/10 9:53 pm PST

    The air conditioner puts an increased load on the motor when it is running; which makes the motor more likely to stall at idle, if there is any clogging or deposits in the fuel system. To address this problem; I would have the fuel injection throttle body, the mass airflow sensor, and the idle air control valve thoroughly cleaned; by someone who is experienced at this type of work. I would also have the fuel filter replaced. You could further clean the interior of the fuel injection system by adding a bottle of Chevron Techron fuel system and combustion chamber cleaner to the fuel tank just prior to filling it with fuel. It then usually takes about 50-75 miles of driving before the deposits are removed. This uniquely effective product is available at Chevron gas stations, Wal-Mart, Auto Zone, and Checker, Shucks, Kragen, Murray, and O'Reilly Auto parts stores.

Answers

  • zaken1 09/14/10 9:53 pm PST

    The air conditioner puts an increased load on the motor when it is running; which makes the motor more likely to stall at idle, if there is any clogging or deposits in the fuel system. To address this problem; I would have the fuel injection throttle body, the mass airflow sensor, and the idle air control valve thoroughly cleaned; by someone who is experienced at this type of work. I would also have the fuel filter replaced. You could further clean the interior of the fuel injection system by adding a bottle of Chevron Techron fuel system and combustion chamber cleaner to the fuel tank just prior to filling it with fuel. It then usually takes about 50-75 miles of driving before the deposits are removed. This uniquely effective product is available at Chevron gas stations, Wal-Mart, Auto Zone, and Checker, Shucks, Kragen, Murray, and O'Reilly Auto parts stores.

  • rmccluskey 09/15/10 3:27 am PST

    The AC draws a lot of power from your engine which results in a loss of gas mileage, about 2 mpg. While idling, such as at a light or stop sign, you don't have your foot on the accelerator pedal, so the engine isn't running fast enough to additionally power the AC, causing the engine to stall. The same if you are driving and let off the pedal to decelerate or brake. Set the engine idle up a little, a screw adjustment at the engine end of the throttle cable that keeps the throttle from closing all the way, so the engine runs faster when no pressure is on the accelerator pedal.

  • actualsize 09/15/10 3:32 pm PST

    This car is new enough that the computer should be detecting the AC compressor "on" cycle and raising the idle speed accordingly. If the check engine light isn't on, you should take it back to the mechanic who installed the new parts and see if he forgot to plug something back in. If it didn't do this before you took it in, he needs to make it right.

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