Except for a radiator that's where all my Peterbilt problems have been- the C-15 engine. When I take it up here to Cat in Lynchburg it looks like F.L.M. has opened a terminal there because there's usually several more trucks there too. Every time I leave i'm wondering when the engine light's gonna come on. I drove many trucks with the N14 and didn't worry about a thing. Then the ISX comes along, and it's back and forth to Cummins because of EGR issues. Had to go all the way to Roanoke to Cummins, maybe that's partly why they went to Cat power. As we've heard here, Mack has their problems too. But, as i've said before, I don't blame the engine manufacturers. When they get something pretty much perfected, like the N14, they have to change it to meet new emissions standards and it's a never ending battle.