Need advise and/or opinions. 2004 2500HD 135K miles. I recently 1 1/2 yrs had all injectors replaced runs great. then 1 yr later had fuel issues as in lack of and dyeing while driving. Found the fuel lines and cooler rotted out. Had those replaced front to back and new fuel filter. Pick up the truck and within a mile find out it surges at idle. Never did this before the fuel line problem. Wondering if junk got into the system and is that the problem or what. From what I read it's the fuel pressure regulator. Ideas?? And trying to find someone to work on it in N/E Illinois? TIA