Hey guys I got a 05 Cummins 230,000 miles compound turbos 200 hp injectors mm3 tuner. Duel fuelers. Ats intake horn. fass lift pump. I was pulling a truck home up and down some hills and I start hearing popping noise coming from the engine when I go up a hill got back to town and it started getting worse pop pop pop. Loosing power back firing. Black smoke out of exhaust. It’s throwing a code po193 fuel rail sensor. Let the truck sit there and cool off start it up. It idles fine. When truck gets warmed up it gets worse loose bunch power and the popping noise gets worse. Took to shop and they hooked up a dodge scanner tool and he told me #1 and # 4 injector was out I pulled those 2 injectors and got them tested there was nothing wrong with them. Not sure what’s going on any help would be appreciated trying not to spend a bunch money.