I have a 1984 and live in northern wisconsin. The problem is it seems to be freezeing up after about 8 miles. i have put in deicer dosn't help. If i let it sit for 15 minutes it will start up. I have noticed some condensation water in the air filter area and in the hose from crankcase vent that splits to what looks like a cold start or idle valve. ANY IDEAS. I have changed fuel filter,this summer a fuel pump relay and a ov relay.