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  #1  
Old 11-01-2014, 11:22 PM
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Idle issues :(

On my 09 grand Cherokee 3.7 with 36,000 miles I'm getting the famous "idle issue" that's been going around. So far I've cleaned the tb, changed spark plugs, and checked transmission fluid yet problem still exists of coming to a red light and the idle drops to around 500-550rpm and not in its normal 600-625rpm range. I'm also hearing this whistle noise or hiss noise once in a while when shifting gears or driving forward. No codes at all. I have yet to replace the egr valage(was gonna try that next). O2 sensors I haven't tried and pcv valve I have not tired. What do you guys think I should start with that would most likely solve the issue? Cause out of the 3 that I stated that I have not tried, 1 or the other worked for someone.

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Old 11-02-2014, 10:34 AM
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Re: Idle issues :(

Anyone?
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Old 11-02-2014, 02:03 PM
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Re: Idle issues :(

Tranny oil level check?


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Old 11-02-2014, 03:19 PM
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Re: Idle issues :(

MAP sensor did the trick for me. It's super easy to replace too.

I doubt your O2 sensors are going already, you dont have many miles on your ride...I'd save that for last since its about $25 per sensor and there are 4. Somewhere there is a post on how to check your egr to see if its not working...maybe on jeepforum? Try that before you spend the $40 on it. Id start with PCV valve since it's inexpensive...then try the check on the egr valve...if the valve is good move tgo O2 sensors or MAP sensor. I even went to far as to change my Crankshaft Position and Camshaft sensors...my gas mileage has never been better.
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Old 11-02-2014, 11:24 PM
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Re: Idle issues :(

Quote:
Originally Posted by DCFD522 View Post
MAP sensor did the trick for me. It's super easy to replace too.

I doubt your O2 sensors are going already, you dont have many miles on your ride...I'd save that for last since its about $25 per sensor and there are 4. Somewhere there is a post on how to check your egr to see if its not working...maybe on jeepforum? Try that before you spend the $40 on it. Id start with PCV valve since it's inexpensive...then try the check on the egr valve...if the valve is good move tgo O2 sensors or MAP sensor. I even went to far as to change my Crankshaft Position and Camshaft sensors...my gas mileage has never been better.
Where is the map sensor?
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Old 11-03-2014, 08:58 AM
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Re: Idle issues :(

The MAP sensor on my 07 3.7 is located directly between the compressor and alternator on the block. Remove your resonator box (assuming you have one) look on the side of the block near the top closest to you. There should be a sensor that's rectangular with little flanges with a torx's screw on one side and a wire plugged into it. Thats my MAP sensor. I'm assuming its the same for you, I googled 2009 Jeep Grand Cherokee 3.7 MAP sensor and the images are of the same part that I had to use.
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Old 11-03-2014, 12:10 PM
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Re: Idle issues :(

Quote:
Originally Posted by DCFD522 View Post
The MAP sensor on my 07 3.7 is located directly between the compressor and alternator on the block. Remove your resonator box (assuming you have one) look on the side of the block near the top closest to you. There should be a sensor that's rectangular with little flanges with a torx's screw on one side and a wire plugged into it. Thats my MAP sensor. I'm assuming its the same for you, I googled 2009 Jeep Grand Cherokee 3.7 MAP sensor and the images are of the same part that I had to use.
Are you referring to that? The thing with the white clip on it?
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Old 11-03-2014, 12:50 PM
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Re: Idle issues :(

Yes, beneath your resonator box and between the compressor and the alternator up against the block.
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Old 11-03-2014, 01:01 PM
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Re: Idle issues :(

Quote:
Originally Posted by DCFD522 View Post
Yes, beneath your resonator box and between the compressor and the alternator up against the block.
Ok thanks. Also would you know what's holding in this egr valve hose in case I change the egr valve? It looks like a metal tube as you can see in the pic but looks like you would just pull it out as its held in by just a gasket?
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Old 11-03-2014, 04:43 PM
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Re: Idle issues :(

Not too sure, some sort of exhasut tube...I think you will be ok pulling that off. Doesn't really look like mine, but mine is a couple years older. Who knows.
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Old 11-04-2014, 08:26 PM
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Re: Idle issues :(

Well replaced egr valve, map and pcv valve and still doing the same thing. Don't know what to do at this point...
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Old 11-05-2014, 10:18 AM
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Re: Idle issues :(

Got a throttle body on eBay for 60 bucks, gonna try swapping it out and see what happens since the TPS and IAC are located inside it
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