No start

[RogerRob]

I just changed the complete fuel system on my 2019 T770. It started and ran for 5 seconds and shut down. It now gives me a MO309 fault and won't start. Seems to be cranking over well enough but won't start. I used a gas rag and it wants to start but still won't run.

 

[RogerRob]

I just changed the complete fuel system on my 2019 T770. It started and ran for 5 seconds and shut down. It now gives me a MO309 fault and won't start. Seems to be cranking over well enough but won't start. I used a gas rag and it wants to start but still won't run. Any ideas of what is happening?

 

[RogerRob]

I just changed the complete fuel system on my 2019 T770. It started and ran for 5 seconds and shut down. It now gives me a MO309 fault and won't start. Seems to be cranking over well enough but won't start. I used a gas rag and it wants to start but still won't run. I changed everything. Filter, primer bulb, pump, rail, injectors and cleaned the tank.

 

[Equipment_Tech]

Prime the fuel primer bulb until its hard

Cycle the key a few times wait 2 minutes in between cycles

Let me know

 

[RogerRob]

Prime the fuel primer bulb until its hard

Cycle the key a few times wait 2 minutes in between cycles

Let me know

It is keypad start

 

[RogerRob]

It is keypad start. I have the battery on charge and will charge overnight. Hopefully it is a low voltage issue like the code indicates. Althought it's cranking over pretty good.

 

[fortworth-cowboy]

I just changed the complete fuel system on my 2019 T770. It started and ran for 5 seconds and shut down. It now gives me a MO309 fault and won't start. Seems to be cranking over well enough but won't start. I used a gas rag and it wants to start but still won't run.

Ok, your Battery is weak. If the ECU does not see more then 10.5 V while cranking the ECU will not allow the Engine to fire.
How did you programmed the injectors and all the other parameters?
What exactly did you replaced?