My 2003 cummins has 320,000 miles on the CP3, I am changing the fuel injectors and wondering if I should change the CP3 at the same time, not sure what the life expectancy of these pumps are, mine has always been fed with the fass fuel system and new filters any idea how long these pumps last,

 

There is no reason to change, unless you are having
problems with it.

 

me personally if its still flowing good and all then i wouldnt. but if you was gonna put new ones in then you might wanna swap it out to while everythings apart

 

IF you are going to bigger injectors an older CP3 may not keep rail pressure up where you need it to be. If you are staying stock and Rail pressure is good then keep it as is.

 

Change it better than being stuck out in the boonies!