So I've been having starting and stalling problems. With the jeep idling way to high as well as rough. Replaced IAC, And my temp guage came to life. Lasted about 3 days, got a new part, still won't work. So I'm wondering if it's the IAC, is bad or of its due to the bad guage. Because I was parked yesterday for about 20 minutes, and I noticed with the gauge off I was idling high, but the second the guage came to life, it began to idle steady and smooth st 800 rpms, once the guage died again it went back to high rough idle.

Also I have no check engine light on, but when performing the key trick it flashed code 17.