I just had my CP3 replaced under warranty and was amazed at the huge gains the truck made in power and rail pressure. The throttle response is vastly improved. Idle rail pressure goes from 5k and instantly to 13k leaving a stop light, when before it would only go to 7 or 8k. Cruising on the highway has gone from 9k to 13k. It was replaced because it was leaking fuel extenally, but it appears there was much more amiss than that.