Quote:
Originally Posted by Jpownell
Hey everyone. I am getting a large “whooshing” sound every time I open my gas cap. 1971 Olds 455 powered Revcon 250.
Unfortunately, I lost the original gas cap. Replaced it with one from NAPA. Should I have a vented or non vented cap?
Also, I’ve been going ahead and opening the gas cap when I stop on the road. If I don’t, the gas tank sounds like it is under pressure to implode.
Could my charcoal cannister need replacing? Any other EVAP type items to check for!
Can someone give me a brief education on what I should have in a 1971 Revcon as far as emission and fuel items to look for?
Just want to be safe in the road!
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I really don't think there's much of an evap system in the early "70 versions on these RV's. A vented gas cap at best. I found no evidence of a charcoal canister and I took out the tank, and had it boiled as well as replaced all fuel lines. That said, I have experienced pressurizing of the tank on long trips, but no vapor lock (yet --
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I may look at a retrofit evap system of some sort. Most likely I'll get the vented cap right.
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