Stepped on throttle,van moved,gave more throttle,van stopped.is it tranny problems or electrical.its a 2004ford freestar.

run a tank of the GOOD fuel through it and see if it improves.
I'm guessing gummy valves

This code will not cause a no start. Does the engine turn over but not fire or what?

check front drive axles

your tranny is shot,like most chrysler vans,the tranny sucks,1200 to fix,junk it

your tranny filter screen is probably clogged.. if not, you may have a pinched cooler line running to the radiator. you will see two metal lines going into radiator side tank. these cool the tranny during driving.. give those things a check.. warning.. HEAT KILLS A TRANNY FAST!

water in the fluid again

If you see where the throttle moves and throttle cables hook up it's on the opposite sid it's a three wire two bolt sensor.

Throttle Body Motor or TPS Sensor, in it.
No reason dealer can't diagnose issues
Could check-Accelerator Pedal Assembly Position Sensor

it is a good possability that replacing the electric seloniod will fix problem.

Shorts wreak havoc on these newer cars with all of it's electronic. The lack of idle is the idle motor on the throttle body, it is an electrical solenoid on the body,it is most likely black and looks like a small film canister with wire and is found high on body (most likely fried)replace.Tranny issue: check make sure linkage is moving the correct distance at the tranny.You may need to remove linkage from tranny and shift the tranny by hand to see if it moves the right amount. The tranny also has electrical solenoids on it's control body. You will have to remove the pan from the tranny still on the car and locate and replace them