My Toyota corolla 2008 is idling rough when I on AC, but when the car is moving everything becomes fine. I just replaced a clean intake manifold. What could be the problem? Any idea plz.
I'd try cleaning the throtlle body. I've seen noticable improvements in idle smoothness after cleaning all the deposits from it. Use carb cleaner, paper towels, and q-tips. Try to avoid spraying a bunch of carb cleaner down the intake, spray it in the paper towel or q-tip and use that to wipe off the deposits. Make sure to get both sides of the butterfly, it's hard to reach.