The first thing that springs to mind is a leaky fuel injector, although this is not the only reason. It may also be a blown cylinder head gasket. These are both problems which need to be checked by a specialist.
The 2004 Ford Expedition is a gas-powered vehicle.
The gas tank on the 2004 Ford Expedition holds 28 gal..
Possibly a leak in the fuel system somewhere.
According to the 2004 Ford Expedition Owner Guide : ( 106 liters / 28.0 U.S. gallons )
105.99153 liters ==
why do my spark plugs smell like gas but the conductor is dry just the threads smell like gas and are also wet
this is a natural occurence, dont be worried.
" regular " unleaded , 87 octane
buy something smaller
( 28 ) U.S. gallons
Varnish, or in other words it does not smell like gas, it smells almost burnt
gas