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No ill effects at all. It's hard to tell just by the needle, but with the A/C on full cold the idle seems to drop only perhaps another 50 RPM, and it holds rock steady. Weird. I can't explain this. Why couldn't I have figured this out years ago? <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" />
Hee, hee. I had to sit there for a minute and keep blipping the throttle. It's amazing how much faster it spools up now, and that RPM hold is definitely gone.


OK, the big test will be letting it sit overnight and see what happens when you start it first thing in the morning.

I really have reservations about this working in cold climates. There's no way the engine will idle at the cold speed of 1000 - 1200 RPM when the IAC is disconnected. It will most likely stumble and run poorly until warmed up.

Tlab, dunno if you can do this on the 1997 and newer with the redesigned IAC. Someone will have to be brave and try it. (I'm not because mine is soldered). The other issue would be dealing with a permanent CEL. I'm sure the IAC is resistive so you'd have to measure the IAC resistance and use a resistor of a close value tied to B+ to fake out the ECM. But a quick check of the circuit diagram seems to imply that the ECM does a "command" and "confirm" with the IAC. In that case it would be almost impossible to fake it out.

1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.