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  #1  
Old 10-29-2014, 01:12 PM
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Low Idle

Trying to see if there is any simple fix to this before taking it to the dealer. My 2014 SRT8 idles really low with the a/c off. When approaching a stop <10mph, it will sit at 700-800rpm like normal, but as soon as the speedo hits 0, it drops to 550-600. No CEL or anything. It idles so low that the car vibrates every few seconds. Is this normal? Does everybody's 2014 idle around 550-600rpm? Could this be something Jeep did for fuel/economy while sitting still?

Could it be something associated with the brake booster/vacuum?

Other than the idle, car runs great and pulls like a beast.

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  #2  
Old 10-29-2014, 02:18 PM
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Re: Low Idle

My idle varies between about 500 and 700. SLightly rougher at times, but otherwise runs great. I just assume it is part of being a Hemi...as long as it doesn't die I'm not going to worry about it.
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Old 10-29-2014, 02:32 PM
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Re: Low Idle

Does it ever vibrate at idle? You can feel the vibrations come and go as the idle slightly goes up and down a little. It's more of an annoyance that the car is vibrating at idle, it's almost unpleasant for myself and passengers.
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Old 10-29-2014, 03:53 PM
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Re: Low Idle

It would be interesting to hook up a decent scanner and see if it's compensating for something. Not enough to throw a code, but maybe it's way out on one of the trim tables compensating for a partial vacuum leak or maybe a weak MAP sensor.

Just a thought....
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Old 10-29-2014, 04:03 PM
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Re: Low Idle

Quote:
Originally Posted by DanMartin View Post
It would be interesting to hook up a decent scanner and see if it's compensating for something. Not enough to throw a code, but maybe it's way out on one of the trim tables compensating for a partial vacuum leak or maybe a weak MAP sensor.

Just a thought....
I could see maybe a vacuum leak, but how could a MAP sensor go bad on a pretty much brand new car? I'm just trying to see if anybody else's 2014 idles <700 at a dead stop, and vibrates a bit from the low idle.
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Old 10-29-2014, 04:24 PM
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Re: Low Idle

Quote:
Originally Posted by vipertoad View Post
Trying to see if there is any simple fix to this before taking it to the dealer. My 2014 SRT8 idles really low with the a/c off. When approaching a stop <10mph, it will sit at 700-800rpm like normal, but as soon as the speedo hits 0, it drops to 550-600. No CEL or anything. It idles so low that the car vibrates every few seconds. Is this normal? Does everybody's 2014 idle around 550-600rpm? Could this be something Jeep did for fuel/economy while sitting still?

Could it be something associated with the brake booster/vacuum?

Other than the idle, car runs great and pulls like a beast.
Mine does the same... Im no worried at all i want it too idles low as possible 500ish. Yeh you get a really lightly vibration at that idle, but i hardly notice it under im really bored and trying to feel every little thing about the car, id say nature of the beast.
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Old 10-29-2014, 07:19 PM
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Re: Low Idle

The low idle is normal, suppose to help save gas
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Old 10-30-2014, 04:30 PM
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Re: Low Idle

Quote:
Originally Posted by vipertoad View Post
how could a MAP sensor go bad on a pretty much brand new car?
I've already had the oil pressure/temp sensor go bad in mine at 2500 miles. It happens.

Just saying to hook up a scanner and see if there is something there if you're concerned about it. It might be nothing...looking at the data you'll know for sure.
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