2004 GMC Safari

172,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JUSTINF89
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I'm trying to set the idle on my safari van and was wondering how I can set up a tachometer to it? Thanks.
Apr 8, 2010 at 8:36 AM
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DOCFIXIT
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Idle not adjustable is controled by PCM via Idle Speed Controler
Apr 9, 2010 at 4:02 AM
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JUSTINF89
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  • 22 POSTS
What would cause it to idle too low most of the time? Is there a way to hook up a tach anyway?
Apr 9, 2010 at 5:12 AM
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DOCFIXIT
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The IAC valve maybe carboned up remove and clean with carb cleaner passageways too. If no check engine light on then carbon likely. Also look for any vacuum leaks. as for TACH not sure check with like Summit see what they have.


https://images.2carpros.com/forum/automotive_pictures/198357_Graphic_443.jpg

Apr 9, 2010 at 7:03 AM
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JUSTINF89
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Thanks for the help. I will try and clean out the IAC with some carb cleaner or something. May I as where you obtained that picture?
Apr 9, 2010 at 10:53 AM
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DOCFIXIT
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Mitchell OnDemand.com
Apr 12, 2010 at 2:39 AM
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