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Discussion Starter · #1 ·
(CIS-E injected)
I have a 3 wire ISV valve laying around my garage and I was thinking of intigrating it into a car wich has no kind of idle speed stabilization. I was wondering
where the ISV gets it's pulse signal from, The ignition coil ground or the hall sender pulse. I know that the ISV's usually have a seperate control module or are run off of the ECU so the idle can be adjusted for temp. I have seen some wiring schematics (84 rocco) where the ISV was directly run from the ignition hall sender pulse and I was wondering if I could do the same.
 

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Re: Idle Speed Stabilizer (gearhead455)

The early Rabbit ignitions with IS units have three wires in and out. When you adjust idle you plug the plugs together. From that I would conclude that the IS unit is between the hall sender and the ECU.
 
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