Hi, this is my first thread i've started, so here we go! My situation is slightly different than those that i read with high Idle. I have a 93 wrangler with a 4.0 engine, five speed manual transmission, and like 154,000 miles on it. When I start up my Jeep it idles just under 1000rpm's. After it runs awhile and it heats up then it starts idling around 1500 rpm's. I just noticed the other day that it seems to be getting higher and is more around 1700rpm's now.
I just bought this jeep in the summer and have been fixing it up as i go and it never used to do this. The most recent thing I did was change the Serpentine belt and then a bit after that it started to do the high idle when warmed up. My jeep does whistle so it sounds like it might have a vacuum leak, but its done that since the day i bought it and it just recently started idling high when warm. Here is a list of things i've done to it mechanically since buying, in case it helps any figuring out with whats up.
I've changed the spark plugs and wires (I used the plugs you don't have to gap), i've changed the valve cover gasket (though i don't know if it totally seated right) and the oil pan gasket, the serpentine belt, air filter, oil, some parts for the four wheel drive to work, gas lines, and a couple other unrelated things.
I just want to know what all possibilities might be wrong with my particular instance before i attempt to fix it up. Oh, also i'm not totally mechanically inclined, I'm working on getting better. I have a general idea with stuff, but i'm no pro or amature. Any help is appreciated, THANKS!!!