f250 5.4 starts then stall no fuel , changed most

[newman]

I have a tough one , my 06 f250 superduty with a gas 5.4 is stalling right after starting , at first if I started it and pressed the pedal I could keep it running at 2000 rpms but let off and it would stall now it wont even start . it isn’t getting fuel even after changing fuel pump , fuel filter , fuel pump drive module , throttle position sensor , fuses and relays are good . it runs as long as I keep spraying starting fluid .
this started out the blue 2 days ago and wont start since
this is the returnless fuel system .
keep in mind that me being tired and dumb that I tried starting the truck by mistake this morning while diagnosing forgetting the air filter assembly , throttle body and intake manifold was off the truck , all unplugged. it threw a bunch of codes
pulled codes and they show
p061b internal control module torque calibration performance
p2106 throttle actuator control system forced limited power
p2110 throttle actuator control system forced limited revs per minute
p0122 throttle / pedal sensor a circuit low input
p0223 throttle / pedal position sensor / switch b circuit high input
p0104 mass air flow circuit intermintent
p2100 throttle actuator control motor circuit open
u1900 control area network communication bus malfunction receive malfunction
cleared all codes and none show up while trying to start it
if I press the pedal the throttle butterfly does open and close
I put inline fuel pressure tester at filter and get 40lbs which should be plenty for a returnless fuel system to start
I can start the motor and it stalls or press pedal and just makes sucking sound though intake and stalls
best that I could I checked wiring and plug connecters , all seem ok
I didn’t change the ECU or the fuel rail pressure sensor or pedal sensor yet , getting exspensive
any suggestions would be appreciated

Topic

[Isaias Almanza]

Do you have spark?

[newman]

yes I have spark . the motor runs for as long as I spray starting fluid in it . ran it for 1 minute straight on starting fluid. but when I stopped spraying it stalled

[EricTheCarGuy]

It does seem like a fuel delivery issue, but I don’t think it has anything to do with fuel pressure. It seems to be more of a control issue based on the codes you have. Have you checked the basics like for vacuum leaks or that sort of thing? Also for any air leaks in the tube between the air filter and engine? With performance problems, you always want to check the simple stuff first. More information here.

http://www.ericthecarguy.com/faq/solving-automotive-performance-issues

You might also look into what those trouble codes might mean. There could be a related issue causing all of those.

Good luck and keep us posted on what you find.

[Bubba]

Please use my words as some experience and some theory:

Fuel pressure……..key on engine off 35-45psi
Engine running………………………………28-45psi

Could Inertia fuel shutoff switch be the problem?

After fuel pressure test you could run a test to see if you have power to injectors………normally parts stores rent/loan tools for this test.

[Bubba]

Update??

I LOVE to hear final outcome so please share with us. Thanks

[Author]

Replies