i have a 2005 e 250 service van, it has manual door locks and manual windows. i have driven it for a while, then it started acting up. i have changed, fuel pump 2x , fuel module, filter, tps. i have been trying to figure out why it dies. start it up, runs for a couple of min, dies out. try to crank it without cycling ignition. it wont start. but if you cycle ignition it will start right up. run for a few min, then die again. i had played with the throttle module and made it mad but it kept running. then i tried to do the relearn for throttle and it was back to dying. i am just not sure what else it could be. i guess the other thing, it doesnt throw dtc. only if i do something to test. otherwise it has no code.... anyone got any help?

 

Which engine?

Do you have a scanner that reads fuel pressure? Did you replace the fuel pump because of this behavior or something else?

Sixto
07 E350 5.4 198K miles

 

I sure would visually inspect the fuel pump driver module
The ground at its base may have deteriorated and the module is failing as a result?
Also, while checking the fuel pressure PID, you can disconnect the fuel pressure transducer and that will force the pump to a 100 percent duty cycle
See if it runs with that transducer disconnected, see what the scan tool says the pressure is, and go from there
Good luck
Have fun

 

first time i replaced was because of this issue, second time was because the first pump failed. fpr shows 50-60, drops to 35 when i turn off vehicle. no indicator of fuel drop out during the event.

 

checked will recheck ground. dont know where transducer is but would try that to see if makes changes

 

The fuel pressure transducer is on the fuel rail that all the injectors plug into
Well, the body of those FPDMs corrode and the whole thing starts to fall apart
If yours is intact, it is most likely okay
There are codes for it failing as well