My idle has been rough and slightly high since i bought my jeep (88 XJ 4.0). its got a new TPS and Im pretty sure my vacuum is good. One time i took off the IAC and it was all gunked up and i cleaned it really good and my idle was like perfect after that....for that night. next day it was back up again. in park around 1000-1100 when cold and slightly higher when warm, and it barely drops in gear. prob around 900 rpm or so and eventually when warm is right up at 1000-1100.
so i checked the IAC yesterday by disconnecting it while the motor was running and nothing happened. does that mean its not working to begin with if nothing changed when i unplugged it? would that cause my high idle and kind of rough fluxuations in my idle? (it kinda bounces up and down by 100 rpms or so while idleing)
help! it drives me nuts. my friends idles perfect at like 500rpm and is totally snooth. ive been searching all over this board and have tried almost everything. ran seafoam through the brake booster vacuum line yesterday too and nothing changed.
so i checked the IAC yesterday by disconnecting it while the motor was running and nothing happened. does that mean its not working to begin with if nothing changed when i unplugged it? would that cause my high idle and kind of rough fluxuations in my idle? (it kinda bounces up and down by 100 rpms or so while idleing)
help! it drives me nuts. my friends idles perfect at like 500rpm and is totally snooth. ive been searching all over this board and have tried almost everything. ran seafoam through the brake booster vacuum line yesterday too and nothing changed.