1998 Nissan Sentra 1.6 liter.Y oil blowin out of oil fill cap?

how did the oil cap fall off and not get lost? check that the cap doesnt fall off again. if you didnt drive with an engine empty of oil, then everything will be fine.

Hi, You had fill too much oil on your sentra. Nissan Sentra use, less oil compare to other brands car with same CC . Never fill the oil that reach max mark of oil dip stick. Please replace your valve cover gasket ( my sentra has P/N: 13270-4m700, your sentra may has different P/N). You can do it yourself. It is only need about 20 minutes to complete.

Regards, vote please, Jay

Could be the fuel pump or throttle body.

yOUR pcv valve is no good. It allows crankcase pressure to build up and oil will come out of your antennae if you drove it hard enough. Replace the pcv valve.

SOUND LIKE DIRTY FUEL INJECTORS.FILL GAS TANK UP.POUR A BOTTLE INJECTOR CLEANER IN GAS TANK.DRIVE CAR AROUND.SO THE CLEANER CAN CLEAN OUT INJECTORS.ALSO REPLACE FUEL FILTER.HEY YOU CAN GO TO AUTO ZONE OR ADVANCE AUTO THEY WILL SCAN YOUR CAR FOR FREE.

a drain and fill is about 3.5 litres.if you pump it out completely including the torque converter,about 10 litres

fuel pump and float

if it blew the cap off it had too much oil in it to start with oil pump might be weakend check oil level when cold not running add or remove oil as needed

sounds like a case of closing the horse after the barn ran away...Pretty good chance that you have lost an engine bearing (yes, that means it's new engine time)
To avoid this in the future regard your oil light as a "you just blew your engine" light. Check your oil at least every two weeks, and this will never happen again (not for lack of oil anyway!!!)

You need to have your engine flushed and cleaned out. One or more of your spark plugs aint firing. You need to replace them all to include the wires as well. If you dont get your engine flushed, you could blow your engine up.