So a few weeks ago, I was helping a friend out by do an EGR delete and new MFE 40% tips, as well as replacing 2 injectors that had balance rates that were out of spec (3 & 5). I got it back together, started it up on the new modified tune and went to back it out of the shop and it started stumbling and billowing white smoke and knocking. Idles and starts like stock, rail pressure holds constant whether it is idling smooth or not. During logging, I noticed that it would only stumble and start knocking above 60MPA. Sometimes it will recover when brought back to idle, sometimes it won't. I tried to use DVT functions to shut off each injector while it is knocking, but I have not gotten it to work properly. Only once out of a dozen or more tries have I gotten it to even respond when I shut an injector off. I've tried restarting the ScanTool each and every time I try using DVT, still no difference. I checked my injector connections, I checked the tightness of all fuel lines, I bled the system of all air via the test valve, and I checked the tightness of each hold down bolt just in case the injectors weren't sealing completely. New balance rates, even with stock tune in and warmed up, are fluctuating all over, but the worst ones are 5 ( -2.xx) and 8 ( +2.xx) in park. I am about to tear into it again, as I have been away for a couple weeks, and I am going straight for #5 injector first and replacing it with the injector I took out of #5 originally. Any other Ideas?
