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Unread 09-12-2011, 09:50 AM   #1
Tikiman357
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1991 YJ Wrangler 
 
Join Date: May 2011
Location: Perris, Ca
Posts: 212
Rpms at idle

Have a 91 2.5 manual. And I am curious to see what everyone's 2.5 is idling at, mine when warm idles about 750 and is a little rough. But runs great at 1000 rpm, just wanting to see if 750 is the norm or should I turn the idle up a bit?

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Unread 09-12-2011, 09:51 AM   #2
Spuznick242
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1995 YJ Wrangler 
 
Join Date: Jun 2011
Location: , PA
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I would turn it up just a touch. Mine's at 800 and it's pretty smooth. If you have a rough idle though, like a loping idle it could be a vacume leak. I had it, turned out it was just a lose clamp.
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Unread 09-12-2011, 10:00 AM   #3
Tikiman357
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1991 YJ Wrangler 
 
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I will double check my vacuum lines later today!!! Thanks
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Unread 09-12-2011, 10:35 AM   #4
oldtime_ironman
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1991 YJ Wrangler 
 
Join Date: Dec 2010
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Mine's at about 750 or 800 regardless of temps. It idles smooth enough, tho I bet it could be smoother with some fresh vac hose.
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Unread 09-12-2011, 10:54 AM   #5
bogleparsons
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2013 JK Wrangler 
 
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Mine idles at 1100 sounds high compared to you guys.

I have TBI can i adjust it?
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Unread 09-12-2011, 10:55 AM   #6
bogleparsons
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Mine idles at 1100 sounds high compared to you guys.

I have TBI can i adjust it?
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Unread 09-12-2011, 12:19 PM   #7
bigbossd1030
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1995 YJ Wrangler 
 
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Location: Edmonton, AB, Alberta
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^^^
Check your vacuum lines such as the one leaving your brake booster etc idle should be between 700-800
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Unread 09-12-2011, 01:07 PM   #8
mrdeath2000
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1993 YJ Wrangler 
 
Join Date: Jun 2011
Location: Surprise,, AZ
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The tach is kind of a PITA to pinpoint your rpms between 500-1000. I assume it goes 0/500/1000 even though that second line isnt linearly spaced.
Mine idles between 700-800 when warm and does idle a little rough. If i bump it up an RCH it's smooth as hell, just havent found the right vacuum leak i guess. Might be the booster itself :/

Try pumping your brakes at idle and see if that smooths out ur idle when you do it.
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