Hay guys, have a question about my volt light. I have an 87 turbo T with 140,000 miles . Motor has about 6000. When I drive down the road every so often the volt light comes on, day or night. When the volt light is on I cant give it more than quarter throttle with out the motor back firing . The light will stay on for about 10 to 15 min, city or highway driving. The car has a new battery and a brand new Napa Gold life time warranty 120 amp alternator. My guess is the cam sensor. Its like the cam sensor isn’t getting the right amount of power to deal with the timing. The car also back fires a little if your driving about 55 mph and you floor it and it down shifts to 2 nd gear. It does this with out the volt light on. Other than that it is the motor runs fine. If you start form a dead stop and floor it it runs great. (12.5 ¼ time) The car got almost all new sensors when redone but the cam sensor I did not replace. I think it is the original one. Please help!!!