Took a short road trip last sunday. About 1 1/2 hrs into it truck goes into limp mod. Pulled out my autocal and code p0202 and 2149. I knew I had read about it at sometime and the ice pick fix. I didn't have anything with me so I limped it into town 10 miles away and bought a circuit tester to puncture the holes with. Did the ice pick fix and truck ran fine. As soon as I get to the red light I get low oil pressure pop up. Pull over and check the oil. Everything is good and no diesel in it. Oil gauge read fine at highway speed but at idle it kept showing low oil pressure. Get back home and I change the oil. Same thing low oil pressure. I pulled ecu fuse and oil line to turbo. Cranked it over and oil shoots out so pump is fine. Today I start it up and sounds like crap. Sounds like a rod knocking and oil pressure gauge is fluctuating now. What does it sound like to you guys? Injector issue or rod knock? I want to check my flow rates with my autocal but haven't found out how to do it. Any suggestions?