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Author Topic: 05 LJ 4.0 Won't rev past 2100  (Read 1724 times)

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Offline scott slade

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05 LJ 4.0 Won't rev past 2100
« on: September 04, 2016, 10:44:53 AM »
05 LJ 4.0,  six speed. Engine light came on at start and would not rev over 2100 rpm.  Idle is fine, can't get engine over 2100 in gear or neutral.   Any thoughts.? 
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2005 LJ, Six Speed,
 16" Moab Rims
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Offline JENSSEN

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Re: 05 LJ 4.0 Won't rev past 2100
« Reply #1 on: September 05, 2016, 09:30:07 AM »
Have you run the CEL codes?
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1. [n] blasphemous behavior; the act of depriving something of its sacred character;

Offline scott slade

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  • Amboy... Route 66
Re: 05 LJ 4.0 Won't rev past 2100
« Reply #2 on: September 05, 2016, 10:26:02 PM »
Haven't checked any codes yet. Thankfully I have work... will check it out Wednesday. 
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2005 LJ, Six Speed,
 16" Moab Rims
HD Broadcast Video Production Unit

Offline scott slade

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  • Posts: 383
  • Amboy... Route 66
Re: 05 LJ 4.0 Won't rev past 2100
« Reply #3 on: September 06, 2016, 09:01:52 PM »
So the check engine light went away and the engine runs fine now. Turns out it was the inline quadrajet input connector hooked to the rear seat fabricater diode.  Typical Jeep exhaust set up malfunction.  All good now.  Seriously no idea what the heck it was... would be cool to find out. 
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2005 LJ, Six Speed,
 16" Moab Rims
HD Broadcast Video Production Unit

Offline JENSSEN

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Re: 05 LJ 4.0 Won't rev past 2100
« Reply #4 on: September 11, 2016, 09:00:38 PM »
bring it by, you shold still have soft codes
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Definition of Link to this definition of Blasphemy
1. [n] blasphemous behavior; the act of depriving something of its sacred character;
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