cptBudd

i cant tell you either whether its a dirty throttle body or iac but here is a write up to clean the throttle body if you wanted to try that:
http://www.fordf150.net/howto/throttlebodyclean.php

03BrowningSport

Cleaned my IAC today. No luck

todzi11a

mine was MAF when it died, you can unplug it to see if that's it

03BrowningSport

Just leave it unplugged an try?

SR2K

You're problem is its an automatic.

Torque converter on its way out maybe?

03BrowningSport

Prolly so.

97badass

Sounds like the converter is locked

03BrowningSport

Output shaft sensor is broke and I do the think the tc locks a lot. Sometimes my truck will fall flat on its face because it doesn't shift right. Tc locking and causing this could be an explanation in my eyes too. If I were to get an edge programmer, could I play with the torque lock settings and fix it?

todzi11a

yeah, when my MAF died I couldn't start it, just kept cranking. tried for a good 30 mins to get it to start. I was in a parking lot away from home with just a few tools. I was at a loss of what it was. It was throwing the MAF code and I just disconnected the sensor and it started up. it idled sporadically but it got me to the part store and I put a new MAF sensor in and problem fixed. I wasn't aware a bad one would keep it from starting. I tried cleaning it first to no avail.