fuel tank air lock - 1800 wagon (1983)

Sounds more like there is some sort of obstruction in the filler tube. Thinking the tube can be fairly easy to remove and inspect.Got to be easier then dropping the tank.

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I've had a bunch of the early '80s GLs, but never had a problem with the fuel tank. Pumps, oh yes, but never a tank issue.

You should be able to stuff an ~ 1/2 inch OD hose all of the way into the tank without major problems (don't ask me how I know this ;-), you might try that, Also, try to put in gas from a gas can; see if that works.

Sometimes the shutoff on modern gas pumps are set too sensitive; didja try another filling station?

Really does sound like a vent problem, tho. Sounds like you've done everything short of replacing the tank; probably that would be the next thing to try. Shouldn't be too bad unless there is a lot of rust. Plan on replacing all of the rubber tubing, as cutting the hard old stuff during removal will simplify life. Probably you'll have to drop the rear diff. carrier (two large nuts IIRC), but that should be about it as far as the chassis goes. Easier if you run the tank mostly dry, the steel tank is pretty light, but most any quantity of gas in one makes it messy and unwieldy (and dangerous). Come to think of it, there's probably a drain plug in the tank.

Hope this helps. Write back and let us know what you find.

ByeBye! S. Steve Jernigan KG0MB Laboratory Manager Microelectronics Research University of Colorado (719) 262-3101