I have an 08 PB with the c-15 ACERT that has all but taken me completely out of the business. After replacing the regen system for the second time ($4,000) and having injectors fail one after the other, the truck has always had a miss and low manifold pressure. According to CAT, it was running fine, they could not find anything. Their little computer said all is good and sent me on my way. 3 days later I'm back at CAT, the miss is worse. They said I have a "questionable injector" so they replaced #3 injector and said all was good. On the way to the yard, it was running the same. So I went back. They kept the truck 2 days and said # 6 injector was weak and replaced that. Now I they have got me for $3,600 and the truck is back the following day as that made no difference. So 4 trips in one week to CAT and still no result. "It is in great shape," they said. They could not or would not admit there was a miss.
I drove the truck and continued to work. The miss began to feel normal even the power was not noticeably different. Months later, the miss began to get worse and then it would go away for a day. This time I took it to Peterbilt. Now 2 more injectors are questionable #1, #3. They replaced them, a harness, fuel pressure regulator and again no change. 5 trips to Peterbilt and another $4,000 and no change! Week later I'm back at Rush Peterbilt with the same issue I paid $4,100 and change and I want my truck fixed. They put it on the dyno this time. Now they tell me it has blow over high crankcase pressure and needs an overhaul. It was completely rebuilt in July 2013 that cost $31,000 and has only 50,000 in state miles since. This motor is a real piece of work. And I to want to join the class action lawsuit.