Is there a good thread or article on troubleshooting a CP3 anywhere????
Thanks....

 

What's going on with yours or what issue are you having that you think its the CP3?

 

If I accelerate real hard or if I put a load on the truck it acts like it runs out of fuel. I let off the accelerator and ease back into it and it runs fine then. If I just drive the truck around normal with no load it runs fine. I've already replaced the lift pump and problem is still there.

 

Are you running a programmer? even a fresh lift pump won't keep up with a decent tuner. How fresh is the fuel filter? I would get a gauge on there and see what the FP is and also hook up a scanner and look at rail pressure.

 

Mine did the same with a stock LP......try an after market LP. Roll into the accelerator for now.

 

Rail pressure gauge and LP pressure gauage to start with. That will give you an idea where to start and whats causing the issue.

 

x2 gauges will tell you whats going on and where the problem is...

 

Thanks for the replys... I will be adding gauges soon... here is a little more information.. My truck is bone stock as far as the powertrain goes.... the only mod that I have made is the new LP and it is a FASS 95/95-1008.... Same problem before and after the install of the FASS.... Are there any sponsors on here that sale gauges? thanks again...

 

ok, so we can probably rule out the LP. I would lean towards the relief valve or the FCA at this point

 

Or the rail relief valve.

 

That's what I said?

 

So I guess my next step is to get gauges to diagnose the problem...
What do yall recommend on gauges...???? Install a permanent LP gauge and use a programmer to check RP????? or what???

Eric do yall sale gauges? and what setup do you recommend??

 

I found this in my Service Manual.....
checking FCA...

"After removal, inspect FCA for corrosion or
damage. Shake the FCA and listen for a rattle. If
FCA does not rattle, replace it."

What else can I do to trouble shoot the FCA?
Can I check the resistance of it or anything else?

Is there anyway to troubleshoot the relief valve other than monitoring fuel pressure?

 

So you did, my bad, must be the dyslexia kicking in and making miss words.

 

No worries man!