The car should run around 500 -550 rpms with the IAC unplugged. You may need to get some throttle body cleaner and clean the TB or even adjust the idle stop screw slightly. The tps should read between .85 - .95 volts with the key on or with engine running at closed throttle. You will have to back probe the tps plug end to get the voltage reading from a DVOM or use a code scanner that reads DCL information to get the tps voltage. I stick a long needle into the back of the tps plug to read the voltage with my DVOM. The idle stop screw will mess with the TPS voltage so one thing will affect another.
car fires up then dies...........wont stay running.....brand new IAC from Ford. Any ideas..........
I hope you didn't get a bad IAC, that would be a pain! Maybe the stop screw and TPS need to be calibrated? Here's a thread on how to do it:
Here's the full thread:
http://www.sccoa.com/forums/showthread.php?t=78735&highlight=tps+idle+iac+volts
okay......a question....i drove the car for 2 days with the IAC idling high and sounding like a goose (really bad when i shut it off), could that have done any damage to anything? I finally got the car to stop stalling when put in gear by adjusting the idle set screw to idle slightly higher. It still wants to stall but at the very last second it catches and stays running......i unplug the IAC and the car stalls, as it should, so the IAC is good, not a defective ford part. I replaced the TPS also with a spare i had and no dice, it still wanted to stall, so, that is when i adjusted the idle screw. I really hope there is a quick, easy fix for this or the SC is going bye bye.....or at least it will be replaced with an import for a daily driver.......
yeah that was the screw i adjusted......oops...i'll do a leak check with propane......
Just curious, but did you disconnect the battery at any point and let it set for about 15 minutes since the replacement?