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Tech help only please 6.4 split tip injector
Ok first off I am a International tech and this is on a maxxforce7 (aka 6.4 (for the most part)) in a IH CE-200 school bus. This is the first one that we have seen for anything more than an oil change. Anyways it came in for shutting down after about 5 seconds after starting. The oil level is also about 2 inches above full on the dip stick but I cant smell any fuel in it. Hooked up the computer and it had codes 2783 - DPF load above warning level - Active MaxxForce 7 - 2782 - DPF servicing required - Active MaxxForce 7 - 4562 - Cylinder balance below minimum limit - Active. These are IH codes not Ford. Started the bus it was very slow to start and sounded like it was starving for fuel. While monitering the computer I saw the exhaust back pressure rise to almost 60 psi then it would die. I disconnected the exhaust from the back of the turbo. The bus started the same but stayed running there was also extremly heavy white smoke I could bearly see to pull it in the shop. The maxxforce7 will not do the auto injector dissable test or the relative compresion test on servisemaxx so I did a manual cut out test with DLC II both #1 and #2 failed. #1 was much worse on the test. I started a case file with IH. They said to drain the oil to the correct level, replace the #2 injector since it was the one with the code and to drop the DOC and DPF and inspect. The DOC was fine but the DPF was completly clogged. So they said to replace the DPF. I am going to change the oil not just drain as they said to but what do you other techs think of this? Like I said #1 failed worse than #2 why not replace #1 and why only drain to correct level not change? This is my first time with this engine and my dealers first time with it so I would realy thank anyone that would help with this issue. But again please techs only.
Certified International Tech unfortunatly specializing in the VT365(6.0 power stroke) engine. I'm here to help those people(as much as I can) that are lucky enough to have this in a light duty and not a medium duty truck.