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-   -   Where does your 6.4 idle at (http://www.jeepgarage.org/f97/where-does-your-6-4-idle-at-48644.html)

HAMMMERHEAD 10-10-2012 10:05 AM

Where does your 6.4 idle at
 
It has just cooled off down here enough to occasionaly run with the AC off. One thing I noticed is that my engine idle will drop to 500 rpms like when you are waiting on a stop light and the truck is in gear. With the AC on it never dropped below the 650 ish rpm range. 500 rpms seems really low, are you guys seeing this too?

barish93 10-10-2012 02:16 PM

I've noticed mine does this also. Not really sure why though.

mjw930 10-11-2012 10:01 PM

Re: Where does your 6.4 idle at
 
Mine does the same, normal idle is around 700 but it will drop to 500 for a few seconds as if its going to stall then it catches and settles back to 700. It was disconcerting at first but I'm used to it now.

ECSZ06 10-12-2012 02:53 AM

Re: Where does your 6.4 idle at
 
Same here I thought something was wrong a first but I guess its the way the made it. They want us to save gas. LOL

Kadonny 10-12-2012 09:40 AM

Re: Where does your 6.4 idle at
 
I'm pretty much at a constant 700 with the AC off.

HAMMMERHEAD 10-12-2012 12:09 PM

Re: Where does your 6.4 idle at
 
Hmmm. Once mine falls to 500 rpms it doesnt climb again until I mess with the gas pedal. It happens everytime at a long light. Im thinking about disconning the battery and reset everything

Jeep_addicted 10-30-2012 09:31 AM

Re: Where does your 6.4 idle at
 
It must be an idle speed programmed in there because the 3.6L does the same thing.

Turbofx35 11-02-2012 05:46 AM

Wow my jeep dos the same thing I was all ready thinking some thing was wrong withe my engine.

Alphainfinity 11-02-2012 10:49 AM

Re: Where does your 6.4 idle at
 
Quote:

Originally Posted by Kadonny (Post 696023)
I'm pretty much at a constant 700 with the AC off.

Same here. And the oil pressure rises to 60+. I would have thought they wanted to keep the oil pressure as low as possible while the oil warms up....

mjw930 11-03-2012 07:15 AM

Re: Where does your 6.4 idle at
 
Now that I have run a couple days without the A/C I see the same thing. At a stop light the idle drops to 500 and stays there. If I turn on the air it jumps up to 650. It's working fine and idles quite nicely at 500 (this is in gear, in park or neutral it seems to stay at 650 regardless)


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