Suddenly VP2003 won’t run.

[Hollyberry]

Folks.. we’ve had this boat (and engine) for 5 yrs and it’s always started readily with a full throttle neutral setting.
The other day it caught instantly as usual but died after a couple of seconds and refused to fire again.
We determined that the electric fuel pump (replacing the engine driven feed pump) had failed. Replaced it and decided to change both fuel filters while we were at it. After filling secondary filter we experienced difficulty getting fuel up to injectors. It took an inordinate amount of time (yes RW valve shut) but I feel we got it - and still no joy.
Only a very wispy light smoke when cranking. No reason to think we’ve suddenly lost compression- it ran fine a week ago.
It’s almost acting like the fuel cutoff is engaged (it’s not externally ).Ideas??

 

[Davidasailor26]

We determined that the electric fuel pump (replacing the engine driven feed pump) had failed. Replaced it and decided to change both fuel filters while we were at it. After filling secondary filter we experienced difficulty getting fuel up to injectors. It took an inordinate amount of time

Can you run the pump with its outlet disconnected to see the amount of flow, then repeat to see the flow out of the filters? Also, do you have any kind of inspection port in the fuel tank to see if gunk is clogging the pickup? My guess is the problem is there, but you can start to narrow it down to eliminate other places down the line.

 

[JoeWhite]

Here is what I found wrong when my engine refused to run suddenly while at sea

Fuel Starvation | Sail La Vie

mei1970.org

 

[Hollyberry]

Thanks gents, appreciate the feedback.
I have good, clean fuel through both filters and up to the injector pump.

I suppose the most likely culprit is still not bled properly- will attack that again tomorrow- but given the efforts on that front already I’m wondering if the fuel rack is somehow sitting at cutoff.

 

[Don S/V ILLusion]

Did you bleed the fuel line at the last filter and then at each injector?

 

[Hollyberry]

Update:
I have a mostly complete spare engine and opened up the throttle body/cut off module with the idea of seeing if fuel cutoff might be in play. Armed with that visual I opened the same on the boat and found that the linkage spring on the throttle arm had let go. Re-attached the spring and with throttle actually advancing was able to quickly and easily bleed the injector lines. Motor started right up after that!
Mystery though, how that spring let go; had a heck of a time getting it reconnected.