I hope this is a good place to post this.

I have a 94 ford f150 5.0 super cab with 2 tanks
I'v been having some problems with it...

At first it was nothing and has progressively got worse. When I would be driving down the road every now and then I would notice the truck felt like it ran out of gas...with my foot on the pedal pressing it (never letting up) it would lose power the pick it back up...

Then it had a hard time cranking it would crank and crank and finally turn over. Then would run fine...

Well it progressively got worse to the point that it will not run at all just keeps cranking and cranking with no turn over...i did kindof notice that the intervals of running to turning off got smaller and smaller to the point of it won't run at all anymore


So far I gave replaced the following to no avail
1. Fuel filter
2. Distributer
3. Spark plugs
4. Throttle position sensor

If anyone has any idea of what is going on I'd appreciate it

I ran codes and this is what I got koeo codes 121, 134, 157, 334
I can't get koer codes because it won't run..

 

When it does shut off its not like it's starving for gas it was just like from running of off just like a snap of your finger...no rough idle no bog down...

Also I pushed the fuel pressure thing ( sorry I don't know what it's called) at the fuel rails for the injectors but I know I have fuel pressure and the pump works b/c it squirt everywhere when I push the pin down

 

You'll probably get more input from the 87-96 forum:

1987 - 1996 F150 & Larger F-Series Trucks - Ford Truck Enthusiasts Forums

As for your problem, my first guess (without doing any actual diagnostics) is the ignition module mounted on the distributor.