Leaky rail pressure relief valve -wierd-

[JBallou]

Long story attempting to be made short. Installed a new X2 module 65 hp, had old X1 65hp 2weeks prior, truck pulled hard, good boost 40psi. Now with new X2 box, same old wiring, low boost 28-29psi. Tried multiple down loads, still 28-29psi, one time 38psi. Tried friends box, same thing. In other words lower boost than what the truck will do stock.



Got to checking things, found fuel in the banjo bolt that holds down the fuel return off of the rail pressure relief valve. This would signify that the rail valve has popped. Correct? Used a solid bolt for test purposes to hold down the banjo. Tried the X2 module and same as before, less boost and more EGT than stock. Removed the X2 tried it with the bolt stock and runs exactly the same as stock stock.



I think that I have multiple problems-- duh. .



New fuel filter. Gonna see if I can get it in for some check up/ work.



Don't know rail pressure, don't know inlet fuel pressure ie lift pump, can hear it. Any ideas? Lower than the normal fuel mileage of 14. 5 down to mid 12s



Truck seems to lay down with this last tank of fuel, same fill station.



Any ideas to try next?

 

[JBallou]

Lift pump fuel pressure gauge on the way, the one that plugs into the Zuadzilla commander, one more thing to rule out. Any other thoughts?

 

[Strokercummins]

Hi



Could some of you CR experts give me a hand or better yet, your knowledge? The CR pressure relief valve has a history of failure. I have been looking on the web for a few days to find out why.

This is what I've heard. (1) The spring weakens and looses its force (2) The seat and poppet become etched (3) The poppet tip breaks off

What have you guys experienced? Have you done any testing on the CR relief valve?



Thanks for helping me out.

Rob

 

[JBallou]

Nice thread revival.



I solved my issue after much deliberation and others crying to Quadzilla. It was a programing issue from Quad. They denied it for the longest time even after I tested all my stuff.



Pulled the X2 and got a Smarty Jr. solved my problem.