Fueling problem

[cmont58]

So I'm having a major fueling problem. I'm only building a max of like 8000 psi once warmed up but 15000 when cold and 15000 after I run it for a couple hours. Swapped fca's with a buddies good one and my AD is running at 18 psi at idle. Throwing a po148 and a fan clutch code. Is there anything I should check before I throw a cp3 at it or can the fan clutch throw the fueling off that bad? Thanks in advance.

 

[07redsled]

crossover tubes leaking .. see if any are loose and TQ them

 

[chris lang]

Have you tried disconnecting the fan clutch to see if it affects rp?

 

[cmont58]

Yea I'm gonna do that today.

 

[Dtruck1]

The fan clutch code will derate the engine.

 

[cumminspa75]

Fuel Pressure Relief Valve getting weak?

 

[cmont58]

Prv is blocked off for the time being and a new one is sitting in my toolbox.

 

[Toolman]

The clutch fan can really mess things up. It was completely shutting my truck down when I launched it. When I took it off the truck everything was fine again.

 

[cmont58]

I unplugged it so we will see what my rp is when I get off work and hook my laptop up. Thanks for all the help guys.

 

[cmont58]

Well unplugging the fan clutch didn't help any. Guess I'll check my connector tubes next.