John Deere 401-c. Fuel problem

[JBarbee77]

I have a 401-c that will run for about a minute and start missing and then shut off. I've changed fuel filter, no help. I've gotten ALL trash out of tank. Still no luck. I have taken fuel line loose from injection pump, and can hold finger over line, turn motor over and fuel DOSENT push finger off line. Is that the problem, lift pump bad? Or is that normal? I don't know how much pressure those things push. Any input would help!

Thanks guys
Jason

 

[LJD]

The injection pump does not need any pressure fed to it in order to run. Sounds like you've got a broken plastic weight retainer inside the injection pump. Very common.

 

[JBarbee77]

Thanks LJD

So I need to get the injection pump looked at? Maybe rebuilt?