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Hey, guys, I just thought of something that seems obvious. I think that I'm getting exactly the same results as "here" did in his original post. The difference is his KIA techs pulled a trick that allows it to remain plugged in and not throw a CEL, but behave as if it's unplugged. Does that make sense?


That's the difference between OBD-I and OBD-II. You won't get a CEL with the OBD-I vehicles if you pull the IAC connector but you WILL with OBD-II vehicles.

Why? Because OBD-I does a "command" but no "confirm". The ECM simply sends instructions to the IAC but doesn't have the capability to confirm it actually happen. OBD-II does the "confirm" hence will set a CEL if it doesn't get the proper response.

That's why on 1996 and 1997 U.S. Sportages with OBD-II and all Sportages after 1998 it's gonna be hard to fake out the ECM and prevent a CEL.

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