I am new to this forum. I have purchased a 2005 Winnebago Journey 36G. I’m having fuel issues. The previous owner let it sit for 4 years and I’ve been told the fuel gels and gets Algae. It would crank but would surge if revved up. It would appear it was going to run and then would start surging and cut off. I had the fuel drained and both filters replaced. It ran great for about 80 miles and its back to it surging and eventually cuts off. Luckily I was only about 5 miles from home and was able to...