Ok, helping friend out here guys- Got PPE Dual fueler kit installed and problems began right off- rail pressures were all over, truck has Bully dog on it and reflashed it and that seemed to cure it ...WRONG, on a short test drive the rail pressure spiked to 26K and stayed there. IDEAS???

 

Bad FCA on one of the pumps would be my first thought.

 

Is one of your CP3's a Durmax? What is your lift pump pressure?

Paul

 

Dont drive it. Dont run it over idle until you get it fixed. Probably the FCA.

 

X2 I had rail pressure all over blew up the cp3 and metal went all threw my system. Also FCA's will go bad from sitting with out use.

 

or...bad rail sensor connection or sensor...

 

was the rail sensor! Thanks guys!!

 

have any of you guys broken the high pressure lines with your twin cp3s? i blew 2 in the last 2 weeks, makes a hell of a mess and lines are 112.00 dollars a piece!!!!! my rail pressure is never over 23000 psiuntil i shut the engine off then they will spike to like 29k for a split second...they only ever break at highway speed though. Are you not supposed to run that extra flexible line from the stock cp3 to the top of the fuel rail? i also have an ATS Atomizer that i keep turned off now, not that it did much??? any ideas??? sorry for the long post. thanks