[/quote] I recall new ECU's take time to learn the correct idle but I don't think it should run that poorly. You confirmed the new isc is still good right? the ecu and isc can make each other go bad. <img src="/forums/images/graemlins/frown.gif" alt="" /> [/quote]

No I didn't Offroader. I do not have any tools or place to check it. But the one I bought was from Autozone, and it came with a lifetime warranty, so I called them and told them the one I just bought was bad, and they will have a new one in the store at 8 am. I asked if she would refund me once I brought the "bad one" back, and she said she would. I rented a car, so I will go there first thing and get it, put it in the truck and see if that is indeed the problem. New IAC and new used ECU. I sure hope this does the trick. I was not aware they could make each other go bad, I thought only the IAC could ruin the ECU. Thank you for the heads up. It is much appreciated, as always, sir.

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