I purchased refurbished PCM to replace my PCM, that out of the blue showed a no bus connection driving home. After the truck was check for good continuity through the Can bus Network i ordered a replacement PCM. The new PCM from GOECM cleared up the no bus issue, everything functions as it should accept it only ran the injection pump for about 30 seconds and then would not fire the truck up. After several hours of verifying fuel was getting to the injection pump but was not being injected into the motor. The original PCM was put back in and the truck started up first crank. With the old PCM installed the no bus issue returned. The new PCM was sent back for warranty, so I'm really hoping that they can make this right, and they can send me one that will fix my issue and will last as long as the original one from factory. This truck is used to haul my mini excavator that is already over a week late for the next job. I'm really hoping that they can get a good computer back to me in a timely manner so I can honor my obligations with my customers.