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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


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contributions: 1945
Images: 37
Location: Oregon
wow, you replaced a lot of parts. Did you check to see if your fuel injectors are getting a signal to open? Fuel pressure looks okay but the fuel injectors have to receive signal from the computer to allow fuel into the motor. You can use a "noid" light, a test light, a logic probe, or anything that can see if you have power on one side of the fuel injector circuit and that the computer is grounding the other side to complete the circuit.


   
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milkmandelight wrote:
> 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


   
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contributions: 1945
Images: 37
Location: Oregon
are you using a scanner to get the codes or are you using a code reader? If you have a scanner available, check the injector pulse width. See if it shows the fuel trims. O2 sensors. See what is going on.


   
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Try to change MAF (mass air flow sensor).... good luck


   
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