My cam sensor cap went bad so the great folks at Casper electronics fixed me up with a new cap at a great price. Always a pleasure dealing with those guys. Got the new cap and just installed it since the cam had already been timed with the old cap. Once installed the light would not come on which was weird since it was timed and ran even with the old cap being messed up. The problem with the old cap is the wires had come exposed after years of use. So, i pulled the cam sensor, brought the engine to top dead center per the directions and reinstalled the cap. Bam, light came on, it was timed. I ran around the block a few times and then parked the car for the weekend. When i got back home after the weekend i went to start the car and it backfired as if it were 180 out. I looked at the engine with the key on and the cam light was out as if it were not timed. What could cause the cam sensor to no longer be timed when it ran fine before being parked?