Ahhhhh Classic Air. I didn't read far enough I see. I wonder if a vac hose is connected to a wrong port. Might have to give Classic a call. They've probably run into the problem before.
Mike, I'm not the Original poster with the problem...was just trying to educate myself. I was just curious. I basically run my truck on Recur all summer and don't have any issues. Regards, Jason
