The wiring harness connecting to the IAC has gone bad. How do I know, you ask?

I made adjustments to the idle a while ago, then realized I had a vac. leak, so I then needed to readjust. Upon extending the IAC pintle all the way, I heard that it was NOT moving in a steady series of clicks. It was highly irregular, often not doing anything for a second or more. If I wiggled the wires a bit, it would become a steady series of clicks. So I was wondering, if I could just extend the IAC pintle all the way, leave it disconnected, and bump up the idle screw to about 650-700 rpm's in drive.

Of course, this would only be a temporary fix until I could get a new wiring harness, and I realize I would probably see that lovely SES light until then, but would there be any other issues? It wouldn't take much for me to give it a little gas at start-up, but since the weather's hot here now anyways that might not even be necessary.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

It'll work, just not very well. Like you said, you may have some stalling issues. You won't get a check engine light, for some reason there is no SES code for a bad IAC.
bsa