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Oct 18, 2008, 05:30 PM
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#1
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Evolved Member
Personal Sales Rating: ( 19)
Join Date: Jul 2004
Location: Wheeling, WV
Posts: 747
Drives: '05 MR
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Adjusting idle
I've been searching the service manual high and low and can not find any information on adjusting the idle. I found info on how to check it, but not a procedure for adjustment.
I did see:
"NOTE: The idle speed is controlled automatically by the idle
air control system."
Beforing adjusting the BISS, do you have to ground a plug or anything like with the DSMs?
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Oct 19, 2008, 01:09 AM
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#2
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Evolving Member
Personal Sales Rating: ( 2)
Join Date: Apr 2007
Location: Greece
Posts: 221
Drives: evo ix
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i think there is an SAS actuator that needs to be enabled (or disabled) with evoscan or the dealer's MUT tool.
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Oct 19, 2008, 08:08 AM
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#3
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Newbie
Personal Sales Rating: ( 9)
Join Date: Oct 2008
Location: Georgia
Posts: 50
Drives: EB Evo IX, RHD EG Hatch K20
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The tatrix cable can be used by you or your local tuner to raise or low your idle through ECUflash along with many other things. Will not throw any codes.
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Oct 19, 2008, 08:10 AM
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#4
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Personal Sales Rating: ( 13)
Join Date: Dec 2005
Location: West Palm FL , NYC
Posts: 3,415
Drives: 2006 Evolution IX, 2006 Range Rover Sport SC
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I thought It had a screw by the throttle bodie than can be adjusted to a degree if that doesn't work check for boost leaks 
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Oct 19, 2008, 08:52 AM
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#5
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Evolved Member
Personal Sales Rating: ( 19)
Join Date: Jul 2004
Location: Wheeling, WV
Posts: 747
Drives: '05 MR
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Yes, there is the Base Idle Set Screw (BISS) on the t-body. Before you adjust the idle though, the IAC/ISC should be disconnected or disabled so it doesn't interfere with adjustment.
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Oct 20, 2008, 01:52 PM
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#6
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Newbie
Personal Sales Rating: ( 0)
Join Date: Nov 2005
Location: Burlington, CT
Posts: 23
Drives: Mitisubishi Evolution
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Can someone please post a pic where the base idle set screw is on the evolution. I have searched and I cannot find it. Please help me out
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Oct 20, 2008, 02:17 PM
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#7
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Evolving Member
Personal Sales Rating: ( 2)
Join Date: Apr 2007
Location: Greece
Posts: 221
Drives: evo ix
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on top of the tbody you cant miss it
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Oct 20, 2008, 02:22 PM
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#8
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Newbie
Personal Sales Rating: ( 0)
Join Date: Nov 2005
Location: Burlington, CT
Posts: 23
Drives: Mitisubishi Evolution
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I must be missing it casue I cannot find. Please can someone send me a pic. I have spent hours looks for this and am am stupid but I just need a pic and thats all. Please someone help me out. I will be forever greatful
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Oct 20, 2008, 02:25 PM
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#9
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Evolving Member
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Join Date: Sep 2007
Location: ATL
Posts: 482
Drives: 2002 Lancer OZ
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There may be a rubber plug covering the screw hole.
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Oct 20, 2008, 02:27 PM
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#10
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Newbie
Personal Sales Rating: ( 0)
Join Date: Nov 2005
Location: Burlington, CT
Posts: 23
Drives: Mitisubishi Evolution
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ok so to the back of the throttle body there is a hole. Is the screw in there?
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Oct 22, 2008, 09:13 AM
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#11
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Evolved Member
Personal Sales Rating: ( 54)
Join Date: Jul 2005
Posts: 1,466
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Roger - This is KC form gvr4.org. Man, I am having idle issues as well and messing with tuning... 
From my searches, everyone says don't touch BISS, just mess with the rpm tables in Evoscan.
I may have a boost leak I guess, but last I checked, I didnt.
I do have a MIL.SPEC TB and wonder if my BISS does need adjusted...
Lastly, this SAS actuator to adjust BISS has been mentioned more than once. I need to know what thats all about
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Oct 22, 2008, 09:15 AM
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#12
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Evolved Member
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Posts: 1,466
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Quote:
Originally Posted by bluebyyouEvo03
ok so to the back of the throttle body there is a hole. Is the screw in there?
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yeah, its on the top of the TB and angled towards firewall. It has a philips screw in there you adjust with a screwdriver...
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Oct 22, 2008, 09:21 AM
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#13
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Evolved Member
Personal Sales Rating: ( 54)
Join Date: Jul 2005
Posts: 1,466
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Roger - here you go!
Hope you have Evoscan 2.5 - This seems to be a popular way to set idle. I am about to try this tonight to see if my BISS is off...
EvoScan Actuator SAS Mode
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Oct 22, 2008, 11:02 AM
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#14
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Evolved Member
Personal Sales Rating: ( 19)
Join Date: Jul 2004
Location: Wheeling, WV
Posts: 747
Drives: '05 MR
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Awesome, KC! Thanks.
I was having an idle issue and turned the screw. After a few moments it hit me like a ton of bricks... I forgot that you have to disable the ISC.
To make things even worse, my idle issue was cause from the PCV fresh air line that I forgot to reinstall after messing with the intake.
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Oct 22, 2008, 11:07 AM
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#15
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Evolved Member
Personal Sales Rating: ( 54)
Join Date: Jul 2005
Posts: 1,466
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no problem, ole buddy. Let me know how it works. I have some serious idle issues plauging the car and me. Not sure if its the cam degree off, boost leak, bad 02 sensor up front etc etc...AAGH!
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