Possibly a low idle? 2005 Jeep Liberty Renegade - JeepForum.com
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post #1 of 3 Old 04-09-2013, 10:09 PM Thread Starter
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2005 KJ Liberty 
Join Date: Apr 2013
Location: Albuquerque
Posts: 2
Possibly a low idle? 2005 Jeep Liberty Renegade

I have a 2005 Jeep Liberty Renegade (3.7L V6, 6-Speed Manual transmission) that idles a little "rough" I guess you could say. The tach reads roughly 500 to 515 RPM in park with the transmission in neutral (and first as well when not moving) the stick shift shakes about a bit and there is noticeable vibrations (if you look carefully the passenger seat shakes ever so slightly when no one is sitting in it) there are no engine warning lights nor any warning light at all lit up on the dash aside from a "part time" light which I believe to be an unrelated issue (transmission sensor is flipped). Anyway, is a 500 to 520ish idle normal for Jeep Liberties? Or is this idle to low? Sometimes if I rev the engine a little bit in neutral, the needle will dip ever so lightly below the 500RPM mark and you can hear/ feel the engine beginning to choke, the needle then abruptly bounces back up to the 500-520ish mark. Otherwise, the car runs fine. It never shuts off while its idling. The Jeep has 75,000 miles on it. Any help would be appreciated, thanks!

Yeah, I own a Liberty. Yes, it's stock. Yes, it's engine only produces 210 horsepower, but don't underestimate it. You'll be surprised what it can do.
shaneybrainy13 is offline  
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post #2 of 3 Old 04-10-2013, 06:38 AM
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Join Date: Jan 2005
Location: ohio
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if your throttle body is clean, you spark plugs are newer and stock, and your valves are holding compression it is normal. see the link below. as for the low idle at 500 rpm: i had my pcm reflashed under warranty which raised the idle slightly. mike


06 kj 3.7l, 6speed manual, np241 command track

91 yj 2.5l, ax-5, np 231 3 inck lift, 31'' mud rovers

12 kk 3.7L, 42rle, mp1522, d-30, 8.25.
x99j is offline  
post #3 of 3 Old 04-10-2013, 05:25 PM
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2006 KJ Liberty 
Join Date: Aug 2011
Location: barrie
Posts: 28
This happened to me. 06 v6 6 SPD
Except sometimes it stalled and the idle would jump.

I had an injection service (they flush the system and you burn a tank of premium fuel) fixed it right up. Idles perfect.

My 2 cents
blakeKJ is offline  

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