I installed a new SPR1.1 when I installed my Rosewood stage 2 injectors. It had problems from the start. The truck would run rough when hot and not start, checked everything, IPR, ICP and injectors. I could not make enough HPO to start when hot. I sent the pump back and was told there was nothing wrong with the pump. The returned pump would start the truck when hot, and it did run better when hot then before. Less then two years later and less then 10,000 miles I was having issues again. I could not make enough high pressure oil when hot to start the truck. upon digging further it was the pump again. I cut open my oil filter and it was full of brass. I talked to Jim at Rosewood Diesel and decided to send in another set of injectors to be rebuilt. I installed a
Adrenaline HPOP and have not had an issue in over 5 years.
When I had talked to Jim and told him the issue I was having and the HPOP I was running. He said:
" Those pumps are plain garbage and have been a complete nightmare for anyone selling or running them. You won't get in touch with him as hopefully he has fled the country by now. Yes, it's that bad. I am worried that the pump is coming apart and spitting brass into the oil and that could be messing up the injectors.
Have you looked at your oil filter lately to see if there's any brass in it?"
Hope this helps