Yesterday, going home from the California coast, I noticed the Exhaust Brake was surging while being used. I was loaded with my Camper and flat pulling my Jeep. The boost would vary from 3 to about 7 psi. It would really start to slow things down at 7psi but would immediately let off to lower psi and then back up again. It obviously wasn't working as well as it has in the past, as I needed to use the truck brakes much more than before. Any thoughts?
Rich
Rich