Originally Posted by airman11
Did you get this problem fixed? I'm struggling with the exact same thing on my daughter's mustang.
Removed the eec relay and replaced it. Still wouldn't start (anti-theft light blinking). Came back a couple of hours later and started right up.
It could be something as simple as a battery going bad with an intermittent problem as well. Pats transciever going bad. On some mustangs you could have a bad constant control relay module.. CCRM.
I had an Expedition yesterday that was towed in.... the damned key was missing the transponder... they had dropped it and the cap came off and the chip simply had fallen out.