I recently installed an Edge comp bought from Piers. The unit worked great for the first month or so and then I began to experience the dreaded shuddering associated with light acceleration. The condition worsened and became very annoying while on the road towing. Last week, the unit quit working (the display lights were half on/half off and it would not turn off). I pulled over and shut down. It restarted and worked fine for another coupled of days and then failed again but set a check engine light. I contacted Edge and returned the unit. They said that my problem was not specific to any year CTD but they had seen this before. My question to the membership is if anyone else has experienced something similar and what was the outcome? The Edge folks were not to willing to discuss any fixes or reasons for the failure. They said that they would replace the chip and go from there. I don,t want to be stuck out of the warranty period Thanx in advance.