Looking for some help with fuel rail pressure on a 6.7 2008 Cummins. What's it suppose to be during cranking. Im stuck in Iraq and cant get this Cummins to start.....

Thanks in advance!

 

I believe around 3000, but don't hold me to it. What all mods have you done??

 

Nothing been done to this truck yet....

I'm not getting anything close to 3000, maybe 10.

 

bad lift pump?

and is their any codes?

 

let me clarify....you asked for rail pressure and yes it is around 3k but that is after the injection pump so thats the pressure that feeds the injectors..................you say yer only getting 10 well thats the lift pump fuel feed to the injection pump, 10 is OK as long as it doesnt dip below 5 yer OK.........what do you have for a lift pump????

 

He's got a bad FCA, bad injector, bad fuel relief, bad CP3. The CP3 will draw fuel on it's own.

 

Please update.

 

Moved this to the 6.7l section.

 

I was just told by my dealer that it takes 6k psi at idle for one to run.

 

It was the injection pump not being able to build pressure, due to the pressure relief being faulty and bypassing back to the tank. Changed out the pressure relief and was off with no issues.

Thanks a bunch for all the support!