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Old 11-30-2009, 06:53 AM   #1
Moparnut's Avatar
Join Date: Aug 2009
Location: Windsor, Ontario
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Idle problem

2002 Jeep - 4.0 litre - 5 speed manual - 70,000 miles

Jump in the jeep this morning to go to work and the idle is at 2100 rpms. Even when warmed up it does this.
I can get it to reduce to 1400 rpms at a light by dragging the clutch then depressing and will stay at 1400 rpms but the next light it is back to 2100 rpms.

Jeep running fine before this. Usually idled around 700-800 rpms.
No engine light or codes.

Point me in the right direction . You guys have never let me down yet.

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Old 11-30-2009, 07:00 AM   #2
Join Date: Oct 2009
Posts: 327
try cleaning the throttle body and IAC ( Idle Air Control valve )...

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Old 11-30-2009, 07:51 AM   #3
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Might also have a dirty TPS sensor needing may be stuck in the wrong position.
"We don't build great brakes because we think you don't know how to drive, we build them for the guy on the road in front of you that doesn't." - Black Magic Brakes
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Old 11-30-2009, 01:06 PM   #4
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It was just a vacuum line on top of the intake was leaking. The rubber seal was completely split and sucking air. Fixed it and all is good.
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