i have a stock 04 (nov 04) 3500 4x4 diesel with issues started with water in fuel light,dumped filter asap all was fine then every day the light came on then sucked out fuel tank and changed filter truck still ran bad rough idle sounded like a miss then changed lift pump truck ran fine for 2 days then went to dealer they dropped the fuel tank cleaned it and put pump in tank ($1068.63) went to get truck and it ran the same as when i brought there there answer 6 injectors and high pressure pump i said no way cause when u hit the pedal it goes they say it needs 2 injectors #2&4 i supply rebuilt injectors it still has a miss fire they show me the new injectors are at 80% other injectors are 100% and 98% they say drive it see what happens. i drive it and it was a little rough at idle but had plenty of power then it starts to vibrate while driving thru the engine not from the drive train i went to adjust the idle up to 800 cause it ran a little smoother like that now 2 days later no pedal just idles i am out of my mind with this thing and flashes code 2121 on the dash it has 83000 miles on it