Have seen a few guys install the kits wrong. They install the o ring onto the new driver side rear rail fitting and it does not seat right and seal off.
Low rail pressure with dual fuelers
- Thread starter 06dmax
- Start date
Do the bottle test, if the FPRV is leakin it can send the fuel back the return line....( a leak you cant see) !
Scott you bottle test is a bit different than what everyone else refers to it as. Most of the time its refered to as checking to see if the FPRV is popping open. Your refering to checking return rates via injectors and CP3 correct?
I have had a few guys do this same thing on the install. They install the o ring onto the new fitting from Ppe into the rail. The new fitting needs to seat all the way to seal off the rail past the bleed off hole. With the o ring on you can not get the fitting in all the way and it leaks internal and pops the code some points in time when it gets bad enough it will leak past the fitting. Remove the fitting take o ring off reinstall make sure she's tight also before reinstalling check the fitting seating surface to make sure it has not been messed up in anyway.
Also could have some pinched supply and return hoses after the install is complete, I have had two trucks come into the shop like this after customer installs.
this is for our dual fueler kit for the LBz' and LMMs.
1.Go to the PRV/fuel block supplied in our kit (mounted above the drivers side valve cover) find the black hose, remove black hose exposing the brass nipple on our fuel block.
2.Pinch off black hose with pliers or hose pincher. start truck, looks at brass nipple and see if fuel is coming out. if so shut off truck, if not unplug the 2nd cp3 pump elec plug (motor will get very loud, no worries) now check if fuel is coming out (do not get your ANYTHING by the brass nipple at ANYTIME, fuel pressure can exceed 26,000 PSI!!!!).
3.If no fuel is coming out post back and we will move forward. If fuel is leaking out make sure oring is installed on PRV/RACE valve and make sure its very tight, about 65 ft lbs.
4. if you dont want to make a diesel mess under the hood use a some 5/16 hose and a bottle (Bottle test)...
1.Go to the PRV/fuel block supplied in our kit (mounted above the drivers side valve cover) find the black hose, remove black hose exposing the brass nipple on our fuel block.
2.Pinch off black hose with pliers or hose pincher. start truck, looks at brass nipple and see if fuel is coming out. if so shut off truck, if not unplug the 2nd cp3 pump elec plug (motor will get very loud, no worries) now check if fuel is coming out (do not get your ANYTHING by the brass nipple at ANYTIME, fuel pressure can exceed 26,000 PSI!!!!).
3.If no fuel is coming out post back and we will move forward. If fuel is leaking out make sure oring is installed on PRV/RACE valve and make sure its very tight, about 65 ft lbs.
4. if you dont want to make a diesel mess under the hood use a some 5/16 hose and a bottle (Bottle test)...