airdogII
 

i have a 09 6.4 with rcd tune sbc intake and delete is anyone running an aftermarket fuel system and if so does it make a difference

It makes sure you have enough fuel to your Injection Pump. Low pressure will cause a loss of power and can damage your injection pump.

my truck pulls really good at about 95 it feels like it quits then all of a sudden it starts pullin again almost feels like its not getting fuel i just checkin to see if its a good investment the 6.4's are going through fuel pumps ulsd isnt helping either... thanks luke for the input:c: