[TOK]

I'm no expert on whats in fuels, but I'd try a couple tanks of gas from a different station and see what happens. The other variable is that you were towing. I guess I'd try to drive it without the trailer and see if it happens only under a heavy load.

I'm in PA, and all the "Made with MTBE" and Oxygenated gas stickers are going away and being replaced with Ethanol stickers. Who knows what new stinks are going to be coming from fuel changes.