1997 Ford Expedition, PCM was replaced, along with both coils. I inject fuel manually an it runs but I dont have any signal from PCM, Red leg to injectors is hot.

 

you need to check your pcm grounds to fire the injector the pcm gounds the circuit

 

What is your THEFT light doing at key-on?

Early PATS systems worked by disabling the injectors....

 

I checked the PCM grounds and have no signal. The theft light continues to flash for an extended amount of time, longer than it used to, Do you think that it could be the key?

 

Gotta love Ron White!

 

that could definetly be the case

 

Thank you for the quick response. Do I have to take the vehicle to the dealer or can I just take the key and reg?

 

you have to have the truck at the dealership, where are you at?

 

san jose ca. thanks for the good advise

 

oh little far for me to stop by with my computer

 

"You can't fix stupid!" ?????

 

Hey, I'm cynical from having to work with people with more cents than sense (but not by much). It's not directed at anyone specific here (usually, although I might make exceptions).


There's your problem. PATS is not proving out and the PCM thinks the truck is being stolen. Consequently, the PCM disables the engine.

Since you say you replaced the PCM, it's probably safe to say you did not follow the correct procedure in the workshop manual. Either reinstall the original PCM (if it is not defective) or tow it to a dealer for proper programming.