Truck died running down the highway, started back up. Happened 3 times. Towed it to the shop. Its a '06 with a bullydog tuner. Stored injector circut low and circut high for #8 and Injector Control Pressure Sensor circut intermittent. Any ideas? Truck hasa 115k on it. Had two injectors replaced bout a month ago, #1 and #3. Injectors gone south again?