Hey folks - aside from the obvious possibility of fuel leaking from a bad hose/pipe, what would cause a sudden and drastic decline in fuel economy? My '89 van went from 20/22 to about 12 miles per gallon in a matter of a couple of weeks. I don't smell any gas with the engine compartment open, when it's hot or cold, or when I'm driving it.

Your thoughts are appreciated!
Kestrel