I've been having an intermittent stall issue the past few months. Always at idle, mostly in park while warming up. It happens about once every 2 weeks. I have cleaned the throttle body, installed new 41-103 plugs, replaced cam shaft position sensor, replaced 3 bad coil packs--and 3 good coil packs. ....I realized today that the a/c compressor comes on when you hit the "auto" button on the comfort controls. This is my wife's vehicle that I seldom drive. I did a little experiment today and it seems when the compressor is on, the idle gets a little unsteady. It seems to wobble, or go down, to about 500 rpms every so often( a minute or two) and not at a steady interval. Not enough to stall. Volt gauge is showing 14. I am planning on testing the battery under a load tomorrow. Is there anything else I can check?
thanks.
thanks.