Hi. Within the last week my wife was having trouble with her van engine dying usually either stopped or coasting. I noticed it was idling low at around 500-600 rpm. Normally is around 900 rpm. Also, noticed the low idle happened when the air conditioner was running. It has cut out once, out of 8 times or so, when the air was off. We had the coil pack replaced. We had the local oil change place run their diagnostic and only said there was a fuel/air problem. They said the battery was fine and the alternator was ok as well. Engine sounds fine otherwise also. What other things should we look at?
thanks