Why isn't this thread a sticky anymore?
I'm gonna go out on a limb here, and sound stupid for a minute. is the IAC and IAB the exact same part? All through these posts I've heard people referring to cleaning the IAC in one post and cleaning the IAB in another post, one person saying the IAC is the thing on the front of throttle body with wires, and the picture labeling that same part as IAB. So, yeah I'm a little confused.
Zak
The IAB and IAC are the exact same part.
Ford changed what they called it sometime in the early 90's. It did not change the part or its function, just the name to conform to the emerging SAE standard for all motor vehicles.
I have an 89 5.0. Up till recently it ran and idled great. It still idles great. My problem is, once it warms up, sometimes it will stall every time you take your foot off the gas. I can crank it right back up no problem as long as my foot is on the gas while cranking, and it will stall out again, OR I will rev it as it tries to stall, and it will idle at about 1500 RPM's for about 10 seconds and then stall all over again. If i start driving it's just fine, and the very next light i stop at, it will idle perfectly. Sometimes while driving my check engine light will flick on for a second and turn off, however, when it was hooked up to a scanner, it showed no error codes, I even ran it long enough for the light to flicker and it still gave no codes.
Any ideas?
Thanks,
Zak
Try clocking the MAF (rotating the MAF housing). Sometimes that helps place the MAF sensor inlet in smoother flowing air so that it gets better airflow and makes more accurate readings.