Was wondering if anyone else has had this problem. I have a 95 YJ, 2.5L and recently had to replace the entire exhaust system. Instead of the standard manifold, I opted for a nice set of headers. They also replaced the crank shaft position sensor and the O2 sensor.
Ever since I got her back, the idle runs at 2000rpm cold and drops to 1300rpm warm. I thought maybe the idle speed actuator motor was bad so I replaced it and checked all the vacuum lines. Still have the problem.
I tried resetting the ECU by removing power. Also took it out on a short highway trip to see if that would help. No luck there either.
Getting ready to replace the MAP sensor and the water coolant sensor but am shooting in the dark really. The mechanic says the only code that is being thrown is one that says the coolant sensor is reporting a temp that is lower than it should.
Any help, experience or wisdom would greatly be appreciated.