I'm new the the Jeep community. Just bought a '99 Sahara with 127k miles. Absolutely love it!
I would appreciate any insight into my problem: When it is cold in the morning and I start er up, it has a very rough idle. Jumps from 500rpms to 1500 rpms very quickly and goes up and down like that until she warms up. and after the engine warmed up, my Check Engine light came on. I am going to run the codes today.
Even after the engine warms up, regardless of air temperature, sometimes it will idle at 600rpm, and other times it will idle around 1400rpms, but it doesn't fluctuate like it does when it is cold.
Thanks in advance for your help,