Hi i received the new prom chip on Monday but i have not had time to install it yet. Wheather been shitty, i will probably install it this Saturday. One thing i was thinking about the other day is if i do the IAC reset but leave the IAC unplugged then the truck shouid idle at the base idle speed correct? With the IAC unplugged the computer won’t be able to get the idle up to 1k. This will also be a dead give away to is there is a vacuum leak present. With IAC fully extended out and left unplugged the truck would idle at the base idle that was set at the factory since the cap has never been removed on this TBI. Should i try this before i switch the prom chip? Or am i just running in circles