99 tj 6cyl 4.0
ok i know there are quite a few threads on here about the high idle problem and i have researched them and tried everything ive found so far, here are my symptoms- (sorry its long, trying to be as descriptive as possible)
a few days ago the idle started to jump up and down a bit, i took the IAC apart, and took the throttle body out and cleaned it all, cleaned the IAC, put it all back together and it started to idle perfectly, for about 2 days..
2 days ago it started to stay around 1000-1200 rpms when i was slowing down to a stop even with the clutch in, as soon as i stoped though it would go right down to 500 and idle perfect, this didnt bother me that much but yesterday while i was driving to work i got it out on the highway and it "missed" i am not 100% that is what it did but it felt like it missed, or hessitated, and the instant it did that the check engine light came on, it continuted to "miss" randomly the whole way to work, but the idle went back to normal after it did this???
brought it to autozone this morning and had them read the codes, 2 TPS codes and 1 MAP code, i bought both and replaced them, it made the "missing" MUCH worse, so i took them both out and returned them, put the old ones back in and it went back to how it was (missing but not as much)..
on the way home from returning the sensors my high idle came back WITH the missing, but now it is not going away when i stop, it just sits around 1200-2000 rpms i took the distributor cap off and there was a bit of dry mud in there and they looked corroded so i went and bought a new cap / rotor and 6 new spark plugs, put them in and no change, still idling very high and missing, i after i did this i tried unplugging the sensors 1 at a time, if i unplug the MAP the idle starts to "loop", if i unplug the TPS the idle goes right down to 500, which is perfect?? i have the TPS unplugged right now and it is idling fine, have not tried to drive it yet so not sure if it is missing
*****ALSO***** the cruise control was working perfect untill it "missed" the first time now the light on the dash comes on saying "cruise" but it will not work.......
please let me know what other info is needed to diagnose, or anything to try im at a loss...