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Unread 05-08-2013, 04:14 PM   #1
zj97ltd
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1993 ZJ 
 
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5.2 High Idle

Sunday I cleaned my TB and IAC. Ran fine after, been driving all week back and forth to work. Today after lunch, I noticed that when I got back to work it was idling around 1200 rpm in park. I shut it off and turned it back on and it was back down to 650-700, where it normally is. Got in it to go home after work and it's idling at 1200 again, but not a steady 1200, it roams up and down a good 50 rpm. No codes and no CEL. Any ideas?

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Unread 05-08-2013, 07:23 PM   #2
Montaska
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New TPS time, maybe?
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Unread 05-09-2013, 04:05 PM   #3
zj97ltd
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Anything's possible I guess. Drove it to work today and had no issues, like yesterday never happened. I love gremlins.
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Unread 05-09-2013, 07:09 PM   #4
bigb229
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Vacuum leaks will also cause high idle
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Unread 05-10-2013, 03:33 PM   #5
zj97ltd
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Quote:
Originally Posted by bigb229 View Post
Vacuum leaks will also cause high idle
I was actually checking those out last night... The line that goes from the PCV valve to the intake fell apart in my hands at the intake nipple when I wiggled it. I'm assuming that was the problem unless it does it again.
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