It took me days to read most of the previous posts on this going back years, but I have now done so. I have to say it is a little overwhelming. Here is our experience.
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We recently purchased a 1997 Eurovan Full Camper (91K miles). On its first summer trip, day 1, driving from Phoenix (~1000’ & 104°f) starting with a full tank of regular Costco gas (87 octane) and driving to Payson (~5000’ & 93°f) 90 miles, non-stop 1:30 hours. When stopping for gas and opening the tank, you guessed it, lots of gas vapor. After off-gassing for minutes, the filling it up proved difficult as well, pump clicking off as others have noted.
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Tempted to just run with the gas cap off, but opted instead to just open it up whenever we stopped, or smelled gas. This worked pretty well. I also was careful to orient the gas cap so the two notches were at the 4 and 8 o’clock, (picture included of cap and fill hole). This did not solve the problem, but did mitigate the most obvious symptom, the gas vapor, to a degree.
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I also noticed when we returned home after a couple weeks of mountain driving the rubber pipe that runs from the N80 to the manifold had a wet look where it goes into the manifold, as well as looking to have melted some of the foam on the backside of the plastic cover (see picture).
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Next step for us, I think, is to test and replace N80 and also install “…a filter (NAPA Gold 3002) on the line in front of the N80” as someone else did.
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Don’t think this will fix it, as other have noted, this is perhaps a multifactorial problem. But it’s a start, and something reasonably simple to do. Other suggestions or questions are welcome.
