My 95YJ with a 2.5 L is idling extremely high our replacement sensors checked all my vacuums hoses for leaks and none found so far using a smoke tester. The throttle body is coming to a complete close position, What else could it be?
Extremely high idle
- Thread starter Bun-B's YJ
- Start date
IAC could be stuck open allowing too much air to pass at idle. Block off the IAC air port in the throttle body. It’s a little slot in the side above the throttle body butterfly valve plate.
I replaced the IAC this morning and it still is very high. I’m doing 40 mph in 4th with my foot not touching the gas pedal.
I understand that but sometimes new ones don’t idle correctly either. If you plug the hole and it dies, then you know immediately. If not then it’s just on to the next thing.
Has anyone worked on anything like the intake or exhaust manifold lately?
That’s the problem. You likely didn’t reseat the intake manifold on the dowels properly. That will immediately cause a huge vacuum leak.