post #1 of Old 09-12-2011, 09:50 AM Thread Starter
Tikiman357
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1991 YJ Wrangler 
 
Join Date: May 2011
Location: Perris
Posts: 216
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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post #2 of Old 09-12-2011, 09:51 AM
Spuznick242
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1995 YJ Wrangler 
 
Join Date: Jun 2011
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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.

DD- 1995 YJ 2.5L, Cat delete, 19lb injectors, 30/9.5r15
Trail Rig- 1994 YJ 4.0L, Rubicon Express 4.5inch lift, 1inch body, D30 Aussie, 33/12.5/r15 Cooper Mud Terrains, front bumper, rocker guards
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post #3 of Old 09-12-2011, 10:00 AM Thread Starter
Tikiman357
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1991 YJ Wrangler 
 
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Location: Perris
Posts: 216
I will double check my vacuum lines later today!!! Thanks
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post #4 of Old 09-12-2011, 10:35 AM
oldtime_ironman
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1991 YJ Wrangler 
 
Join Date: Dec 2010
Location: 14304 Niagara Falls
Posts: 2,537
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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post #5 of Old 09-12-2011, 10:54 AM
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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post #6 of Old 09-12-2011, 10:55 AM
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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post #7 of Old 09-12-2011, 12:19 PM
bigbossd1030
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1995 YJ Wrangler 
 
Join Date: Feb 2010
Location: Edmonton, AB
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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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post #8 of Old 09-12-2011, 01:07 PM
mrdeath2000
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1993 YJ Wrangler 
 
Join Date: Jun 2011
Location: Surprise,
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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.

93' YJ 2.5L, 4.88's, 8.8, E-Locker & LSD
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