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ISC/IAC testing questions and issues (Merged)

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98gsxturbo

20+ Year Contributor
44
0
Jun 30, 2002
Hey guys well i just got done testing my ISC to see if it was messed up or not. I looked up some instructions on the net and followed them, and i got the following readings on my ISC in Ohms. This is a basic diagram of the pins in the ISC that I measured..

1 2 3
| | |
| | |
4 5 6

Pins 1 & 2 = 27.4 Ohms
Pins 2 & 3 = 27.5 Ohms
Pins 4 & 5 = 27.0 Ohms
Pins 5 & 6 = 27.4 Ohms

Where my instructions were it says that acceptable readings were anywhere between 28 and 33 Ohms. I'm a bit out of that range. Should I consider my ISC shot and replace it? If any of you guys out there with a shop manual can look this up to verify it that would be most helpful. thanks!
 
Two of the wires go to the MFI relay for power. The other 4 go to the ECU.
Perhaps the ECU is bad (blown driver - they need pulses, not steady voltage) or maybe they're all dirty and stuck (Stealth 316 - ISC Servo Motro). Also: main page

Visually the ECU drivers look fine. I cant feel a slight buzzing feeling when I hold the ISC while somebody turns the key. It wants to move but its like its not getting enough power. My idle is steady and it idles fine exect cold starts. Any ideas how my car could idle fine with the ISC logging so different then it should?

This is a link to an idle log I took earlier tonight
http://www.dsmtuners.com/forums/cylinder-head-short-block/468536-need-review-log-please.html
 
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