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As a starting point,I have to look up how to re-learn my IAC when i install it to make sure it's set right.
The drops might be my issue. I haven't snap-shotted it with a timing light, but have stuck my face in there and watched (recently) and at idle, I was sort of shocked at the amount of wet fuel "dropletting" on the throttle plates at idle. I even ran a can of SeaFoam through it after that.....no improvement.
I installed the Edelbrock TBI manifold about 8mos ago, but had a fine cold (and hot) idle following that.
I reinstalled mine yesterday, and wired it up, hooked it up etc. Only thing I left was the fuel feed line and IAC. I'm going to clean that line out before hooking it up and then reset the IAC.
I know you are busting your ass on this and it's hot as hell out, don't let this stop you now Chris. Just take a break and we will try and help you figure this out.
I have been beating my head against the wall also to get my ECM system kosher. It's a bitch, and being broke doesn't help the least bit.
Didn't you say something earlier here about tampering with the sealed idle screw?