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Old 11-30-2006, 08:15 AM
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Default fluctuating idle at start up

this has been happening ever since i bought my car..its a 2000 dc4
when i start my car, the idle will jump and drop about 3 times then idle perfect..

explained: when the car starts, the idle will jump to about 800 rpms, drop down to about 100, back up and so on..about 3 times then it will idle fine.

my car has a CEL, more than likely bc of bad o2's (haven't bothered to read codes). i thought it was a problem with the motor itself, but when my motor blew and was replaced, same idling problem. any suggestions..?


Modified by MATiC at 9:26 AM 11/30/2006
Old 11-30-2006, 08:22 AM
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Default Re: fluctuating idle at start up (MATiC)

i had the same problem with my gsr, but it would do it longer....i had put it in the shop and they told me it was the fast idle valve...so i changed it myself and it worked...might be that
Old 11-30-2006, 08:40 AM
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Default Re: fluctuating idle at start up (MATiC)

i think 100 rpm the car would die out
Old 11-30-2006, 09:17 AM
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ok maybe not THAT low, but damn near dying..
Old 12-02-2006, 09:58 AM
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where did you get the fast idle valve..?
and where is it located..?
Old 12-02-2006, 04:48 PM
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Default Re: fluctuating idle at start up (DC TWOin IT)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC TWOin IT &raquo;</TD></TR><TR><TD CLASS="quote">i think 100 rpm the car would die out </TD></TR></TABLE>

Actually, my old DA had this same exact problem and it WOULD drop down that far. I asked alot of people and they all said it was my IACV, but I sold the car before I ever had a chance to fix it.
Old 12-02-2006, 05:58 PM
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Default Re: fluctuating idle at start up (MATiC)

check your iacv. i don't think 00 have a fast idle vavle.
Old 12-02-2006, 07:26 PM
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Default Re: fluctuating idle at start up (kay20adc2)

not to come off as a dick, but you are guessing on the o2 sensors causing the CEL....the first place you should start is obviously with the CEL then go from there
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