I thought that I would give this topic a little bump and share what I found on my car. Since I am under the doctors restrictions yet and cannot drive I still go out and putter with the car in the garage. My cell is an 8 gallon Summit with a 6 AN fitting for a vent. It had a 3/8" fuel hose clamped on it,it has been that way since I bought the car. As I was looking it over I noticed that the 3/8" line was almost pinched shut. I removed it and took the fuel cell cap and ring off to tighten the check valve. Thank goodness for 1/4" drive ratchets! I wonder if that may have caused a problem. Also should I put a 3/8" line back on or step up to 1/2"? I noticed that 1/2" line will fit right over the #6 AN fitting. Thanks!! Ted