Canter not starting

[Gary coutts]

It has a fuel pressure control valve right? If that was faulty it would explain it starting when you clamp the return. Still doesn’t explain why it runs fine once you do get it to start. Perhaps whatever controls the pressure control isn’t initially doing anything until it’s running.

Well the mechanic put on the prv and it starts straight up problem solved
Thanks everyone
Gary

 

[SkiFreak]

problem solved

Are you saying that the problem was the Common Rail Fuel Pressure Control Valve (Part# 0928400690)

 

[kerry]

I'm not very familiar with the operation of common rail systems. Can anyone explain the role of that Pressure Control Valve in the system? Relieves pressure when engine shuts off? Bleeds off excess pressure when engine is running?

 

[javajoe79]

I'm not very familiar with the operation of common rail systems. Can anyone explain the role of that Pressure Control Valve in the system? Relieves pressure when engine shuts off? Bleeds off excess pressure when engine is running?

It maintains the proper pressure within the rail

 

[Gary coutts]

It maintains the proper pressure within the rail

Yep pressure control valve a $300 part goes a lot better with the new part's on

 

[kerry]

It maintains the proper pressure within the rail

The IP produces the pressure but this valve must relieve it. Under what conditions does the pressure need to be relieved.

 

[SkiFreak]

A pump creates flow and restriction creates pressure.
A pressure relief valve is a safety device, ensuring that system pressure is not exceeded. It normally only operates when something goes wrong.
A pressure control valve is used to maintain operational pressure in the system, so it is working most of the time. The majority of hydraulics systems use these. It can also double as a pressure relief valve.

Clear as mud?

 

[kerry]

I was trying to imagine the role of this valve in the standard common rail fuel return system? Does it only open in overpressure or does it routinely open to return fuel?

 

[javajoe79]

The IP produces the pressure but this valve must relieve it. Under what conditions does the pressure need to be relieved.

Common rails don’t have an injection pump. They’re more like typical fuel injection but at a higher pressure. The pressure control valve is like a pressure regulator in a typical fuel injection system.