2012 2954D Log loader surging when walking or heavy load on engine

[cutting edge]

You are referencing the breather caps on the filter heads?

fuel tank

what is the fpr valve? rail relief?

You could have a bad SCV on the fuel pump. pull the brown connector at the front of the high pressure pump and see if it starts. Dont let it run like this though,just try to start it.

 

[cutting edge]

would expect different codes though

 

[Hallback]

Pape is on their way now, I will report back.

 

[Hallback]

Replaced SCV today and nothing. 4 injectors going in tomorrow.

 

[cutting edge]

Replaced SCV today and nothing. 4 injectors going in tomorrow.

injectors? why? excess leak off? didnt you do injectors 500 hours ago?

 

[Hallback]

I did but not all of them.
When running tests that is what we came up with based on the fuel use percentages and the cylinder canceling tests.
I hope that is it.

 

[dixon700]

Replaced SCV today and nothing. 4 injectors going in tomorrow.

What is an scv?

 

[Hallback]

$591! Lol
It is a Suction Control Valve. It is located on top of the fuel rail.

 

[Hallback]

And everything was in the drop box this morning BUT the injectors.
What's another day of downtime right...???ointhead

 

[cutting edge]

It is located on top of the fuel rail.

good greif....thats the rail relief, not the scv

scv is on the front of the high pressure pump

 

[dixon700]

Rail pressure relief valve now I'm familiar with that. I'm pretty familiar with Cummins common rail setup and I don't believe there is any suction control valve. Unless that's what the cascade valve is?

 

[Hallback]

And that is why I run them and not wrench on them.

 

[kiwi450x]

Haha, I know the feeling, Hallback...

 

[cutting edge]

And that is why I run them and not wrench on them.

So lets cover a few things

-when the tech is there,with his laptop plugged into the machine, what is actual vs desired rail pressure?

-have him do a harness diagnostic test. what are the results?

-It wont start,will it? If not, unplug that brown connector on the front of the high pressure fuel pump (as I suggested before) ansd try to start the engine....do not let it run this way though. if it starts,shut it down . If it starts, your scv is the problem it is on the front of the pump....you just unplugged it....not on top of the rail.

-will it start with the rail sensor unplugged?

 

[Hallback]

She purrs like a kitty now. 4 injectors and about $7k later.

 

[cutting edge]

She purrs like a kitty now. 4 injectors and about $7k later.

Theres no way you dropped 4 injectors at once...I wonder what the root cause is.

 

[Hallback]

#3 was bad and #2 & 6 were weak. I replaced them all now so as to not have to go back in there again for a few thousand hours.

 

[dixon700]

I always like to replace injectors in sets.