Hi everyone, I've done a search and could not find anything so thought I'd ask. We took an offroad trip this weekend and when we arrived back to camp I could hear the fuel gurgling in the gas tank. We were out all day Saturday and the last 2 hours were crawling through a wash that was slow going. Outside temp was in the mid 70s. Altitude was about 5500 ft. Could a faulty vapor purge canister cause this? I own a 79 with a stock drivetrain and 2f engine. The truck ran great all weekend. No running issues at all.