Thanks for the fast response. The customer could not leave the vehicle this eve, but I warned him that I would likely have to start over from scratch. (Like you said.) The link was also helpful, and I'll be checking those things too. I also suspect that the Crank Position Sensor could be at fault, due to it having oil in the connector. I'm thinking that it has to communicate with the Cam sensor to arrive at the retard offset setting. It's just weird that it would show up at the same time as the dist exchange. Thanks again, and if it does not communicate after all is done, I will respond to the post again.