I have a 1997 wrangler with a 4.0. When I bought it, used, it had an aftermarket cruise control already installed. It hasn't worked in a while.
I replaced my heater core over the weekend and drove it around the neighborhood. No issues. (Except for an air bag light that just came on)
I drove to work today and once I was on the freeway I could not get the rpms to drop
. It was as if cruise control was on. I would take my foot off the gas and there would be no change in my speed. I shift to neutral and the RPMS would be stuck in the 4000+ range. I pumped the gas fast and hard a few times (still in neutral) and it would slowly drop a bit, like down to 3000 rpms. After a bit of driving it seemed to get unstuck and was OK for a while. It got stuck again while I was in traffic. I had to make my way off to the side of the road and shut the car off. I played with the throttle under the hood and it did not seem to be stuck at all. Started the jeep back up and was able to get to work with no issues, but it was all slow speeds from that point.
Anyone have any ideas on what would cause this issue?