Bought truck as is, was told a little cold blooded. Well it is, with injector issues I feel. I had the ficm pulled and sent in to repair and upgrade weak electronic parts, but stayed with 48 volt. Installed 2 new interstate batteries, ones in truck mismatched in size and bad. Ficm was tested bad, when I got truck by friend with code reader that is why sent off. I replaced the oil with 5w 40 syn. I added hotshot to oil. I have ordered out fuel filters, edge cts, and rev-x, and will be picking up 4 gals of prestone hd elc and MC thermostat. I have the restore to do flush along with distilled water. Ok, so I still have trouble with cold start and no power til warm, but oil and hotshot has been in for only 120 miles. With ficm rebuild made big difference in starting. With the oil change another improvement. But still, lack of power when cold and mis (lugging feel) when torqconverter locks up at 55. When I get edge cts will see what codes are on it, friend cleared original codes. The dash temp gauge (coolant) just clears the cold mark by 2 needle widths, seems low, and has green coolant in degass bottle. This is why doing flush and MC thermostat. I am hoping that the injectors will come out of it with oil change and additives. I know fuel filters are big deal with diesels to keeping up power. I have had truck for a couple of months now, and with my job taking me away from home, I have only put on a coulpe hundred miles on it. I want to make this my truck I take out on road with me, so has to be ready to go and dependable. So do ya think the oil and additives will work or will I be doing injectors.