Can't remember what Suzy calls its IAC/ISC, etc. Anyway, when Suzuki updated from the V6 2.0L (H20A) to the 2.5L (H25A), one of the changes they made was in the ISC. The H20A uses a
two-wire valve like this but the H25A uses a
six-wire stepper motor style valve.
Ok, that's the background. I updated the motor from H20A to H25A, but not the computer - this means I kept the H20A
injectors,
ISC valve, and the two-wire
COP modules (well actually I used a BA Ford COP modules which are electrically/electronically interchangeable) and of course the
ECU, but otherwise it's an H25A motor with H20A ECU....
But, my two-wire ISC is buggered (and it has a very interesting effect on my snorkel which produces this farting sort of noise, but that's another story).
Solution:
1. get a new ISC.
2. fix the old,
3. get a converter that somehow changes the two-wire PWM signal, from the H20A ECU, into a series of step pulses to drive the six-wire ISC.
So, being a tech-type, 3 sounds interesting, and something I could actually do myself (perhaps I'm fooling myself how long it would actually take to do bcause we're probably talking about a microcontroller, multiple driver FETs, etc!), but realistically fixing the old is probably the way to go, so:
a. Anyone fixed these?
b. would it just be easier to get a new or used one?