IAC Valve part # question

[zwack88]

Which one do I need? Rock auto came up with 2 different ones.
MOTORCRAFT Part # CX1866
F8VE-9F715BA {#F8VZ9F715BB}
MOTORCRAFT Part # CX1917
F8VE-9F715AA {#F8VZ9F715AB}

Mine pretty much took a shit on me tonight. I runs but starting off from a stop it has now power and it is only when cold. I have been babying this IAC I have on now too long. Sometimes she will start no problem or sometimes she will stuble and die.

[Paul_]

It could be one is for the NPI motors, while the other part # is for the PI motors.

[zwack88]

Ok that makes since. Now I gotta figure out which one is which.

[Johnnyiroc]

wells tv251 52.99 autozone...F8VE-9F715AA {#F8VZ9F715AB} is the one you want, unless you have natural gas...I doubt that you do. I checked here
www.napaonline.com 64.99 it says

[Johnnyiroc]

the napa site shows ford numbers too.