[Diy_efi] RE: High idle still

[patrick movey]

Does your program read the tps signal because when I move the tps it doesent 
do anything?  I checked it with a volt meter and it works fine. Then I 
traced all  the wires and they were fine so the computer is getting the 
signal but it is not doing anything with it. Does it richen the mix for you 
when you move it?


From: "TomQ" <zippy at tomquinn.com>
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>To: "Diy Efi \(E-mail\)" <diy_efi at diy-efi.org>
>Subject: [Diy_efi] RE: High idle still
>Date: Thu, 3 Jul 2003 18:57:30 -0700
>
>Ok my problem is the IAC is not doing what it is programmed to do. The 
>valve
>is definitely opening for some reason. I have a quick question before I
>trace the 4 wires connected to it. If I disconnect the TPS the engine light
>goes on. That makes sense. Now if I disconnect the IAC the engine light 
>does
>NOT go on. How come? Shouldn't the '747 see a problem there??
>
>-TomQ
>
>-----Original Message-----
From: TomQ [mailto:zippy at tomquinn.com]
>Sent: Thursday, July 03, 2003 11:11 AM
>To: GM ecm (E-mail)
>Subject: High idle still
>
>
>Hi all,
>
>I am still trouble shooting my out of the blue high idle problem. I have
>some more data and hopefully someone can point my in the right direction 
>for
>a fix. Once again it is a '747 on 4.2L I6. Been running it with my modified
>program for a couple of years now with no problems. What I currently have
>all of a sudden is a very high idle when I first start up (2500 vs 800). If
>I get on the highway and drive for say 15 -30 mins and then come to a stop
>it seems to be ok. Turn off the motor go inside for 30 mins and then 
>restart
>it and it goes high again. I have replaced the IAC and TPS but that has not
>fixed the problem. Additionally if I unhook the connection to the IAC and
>start it up it still idles high. What do you suggest I should look at next?
>
>
>TomQ
>
>
>
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