0

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.

  • Get an OBD II reader with PID capability and verify that the "AC COMPRESSOR ON" signal is registering. This signal increases idle and compensates for AC load. It's possible an electrical connection was disturbed when replacing the intake manifold. It's also possible you now have a small vacuum leak. – SteveRacer Jul 18 '18 at 1:41
0

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.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.