Idle Air Control unit
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Newbie
Joined: Nov 2009
Posts: 15
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From: Moab
Year: 1994
Model: Cherokee
Engine: 4.0
Idle Air Control unit
I replaced my IA control unit on the TB because it would rev to 1800 rpm's at start up. When I cold start, it only rev's to 1100 but after it's warmed up it rev's high when I restart. Any suggestions?
CF Veteran
Joined: Nov 2009
Posts: 1,671
Likes: 1
From: Northern Vermont
Year: '89
Model: Cherokee
Engine: 242
Make sure ALL the bolts on your intake are TIGHT...I heard of that fixing it for someone.
TPS as well, maybe? Try changing that.
Or start trying to chase down vacuum leaks, again...
TPS as well, maybe? Try changing that.
Or start trying to chase down vacuum leaks, again...
Thread Starter
Newbie
Joined: Nov 2009
Posts: 15
Likes: 0
From: Moab
Year: 1994
Model: Cherokee
Engine: 4.0
Thanks for the tips! I just did install a new exhaust header... I'll retighten all the bolts. Does the TPS behave like that when it's going bad?
CF Veteran
Joined: Nov 2009
Posts: 1,671
Likes: 1
From: Northern Vermont
Year: '89
Model: Cherokee
Engine: 242
CF Veteran
Joined: Mar 2009
Posts: 1,208
Likes: 1
From: Watha,NC
Year: Jeepless at the moment
Its always good to recheck the bolts after doing exhaust work, but it sounds more like IAC beings it comes back to normal. You might try wiggling the IAC connector and have someone start it up.
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