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Old 07-06-2011, 01:29 AM   #1
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Rpm fluttering

Every time I put my Wrangler in neutral as I'm coasting to a stop sign, the rpms flutter up and down by about 2-300. I was wondering if there is some issue there

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Old 07-06-2011, 03:56 AM   #2
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Quote:
Originally Posted by Explorer_of_the_Void
Every time I put my Wrangler in neutral as I'm coasting to a stop sign, the rpms flutter up and down by about 2-300. I was wondering if there is some issue there
I had the same thing. And 4 days ago i had a bent head soo when i fixed tht thw manifold was off and we cleanned ot off with the throttle body. Now tge rpm is stable. Soo i would guess that probably your throttle body need a clean.

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Old 07-06-2011, 04:14 AM   #3
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try cleaning your IAC, very easy and cheap

easiest way to do it-

1- take the 4 10MM bolts out of the throttle body (yellow arrows)
2- unplug the 3 sensors from the throttle body (TPS, IAC, MAP)
3- take the 4 torx screws out holding the IAC to the throttle body (red arrows)
4-take the 2 torx scres out holding the IAC together (purple arrow) (theres a tiny gasket in there be carful with it and reuse it)
5- take an old tooth brush and some thottle body cleaner from any auto parts store and clean the housing (blue arrow) and plunger (brown arrow) well
6- open the butterfly valve ( green arrow) on the throttle body and clean all of it out as well with the same stuff
7- put it all back together and enjoy your nice idle







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Old 07-06-2011, 06:39 AM   #4
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Quote:
Originally Posted by scgeek12
try cleaning your IAC, very easy and cheap

easiest way to do it-

1- take the 4 10MM bolts out of the throttle body (yellow arrows)
2- unplug the 3 sensors from the throttle body (TPS, IAC, MAP)
3- take the 4 torx screws out holding the IAC to the throttle body (red arrows)
4-take the 2 torx scres out holding the IAC together (purple arrow) (theres a tiny gasket in there be carful with it and reuse it)
5- take an old tooth brush and some thottle body cleaner from any auto parts store and clean the housing (blue arrow) and plunger (brown arrow) well
6- open the butterfly valve ( green arrow) on the throttle body and clean all of it out as well with the same stuff
7- put it all back together and enjoy your nice idle
^^ this and/or a vacuum leak
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Old 07-07-2011, 12:10 AM   #5
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Thank you Jeepers, I'm going to fix it!
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Old 07-07-2011, 03:19 AM   #6
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I'm having an idle problem too. I've cleaned everything possible and I can't find a loose or cracked vacuum line. Is there a diagram somewhere showing all the vacuum lines so I can check and see if I missed one?
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Old 07-07-2011, 10:03 AM   #7
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Originally Posted by 2004_Silver_Sport View Post
I'm having an idle problem too. I've cleaned everything possible and I can't find a loose or cracked vacuum line. Is there a diagram somewhere showing all the vacuum lines so I can check and see if I missed one?
any CEL? the only vacuum line that isnt really easy to see is the little 90 deg. elbow at the bottom of the MAP sensor which can cause false MAP readings and can mess with the idle a bit
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Old 07-07-2011, 02:30 PM   #8
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Nope my CEL isn't on
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Old 07-07-2011, 03:07 PM   #9
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Originally Posted by 2004_Silver_Sport View Post
Nope my CEL isn't on
hmm id still check the elbow just to be sure but id imagine it would toss a CEL for it, just pull the MAP sensor off and its right at the bottom of it and connects it to the throttle body, mine was cracked and noone around me had one in stock so i just put a dab of RTV on it, hasnt leaked since

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