My '05 GC runs great at 240km. However, when you come to a stop in gear the idle drops to 400 rpm and then recovers. The warmer the ambient gets the more it does it. It didn't seem to have this problem when I bought it early in the winter when the temps were cold but now that they are above freezing it does it more. When it was very cold it would occasionally stall when you stopped when the engine was cold. There are no codes and the dealer can't help. They said it might be transmission bump stop?? but I think that is something different. Any ideas?
It has new plugs, IAC and I cleaned the throttle body already .I might just start replacing sensors