Normal idle rpm for 01 TJ 4.0 6cyl?? - JeepForum.com
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Unread 02-16-2006, 11:14 AM   #1
Rick3401
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Normal idle rpm for 01 TJ 4.0 6cyl??

Hi all,
Can anyone tell me if 600-700 rpm is normal idle for my TJ? Seems to want to cut out once in a while.
TIA
Rick

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Unread 02-16-2006, 11:16 AM   #2
Jerry Bransford
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That's a bit low, perhaps the TPS (throttle position sensor) is going south. Erratic idle is often a result of a bad TPS.
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Unread 02-16-2006, 11:20 AM   #3
Rick3401
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Thanks Jerry, you da man. My TJ died yesterday while driving. Had it towed home and discovered no fuel at the rail. Found a broken wire to the fuel pump and repaired it. Starts and runs okay but seems to idle low. I'll check that.
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Unread 02-16-2006, 01:53 PM   #4
willy peter
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Sounds pretty normal to me.
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Unread 02-16-2006, 02:32 PM   #5
grymsr
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my Tj idles around there as well but runs fine. cruising it runs about 1500 which seems rather low, but again, it runs fine. go figure.
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