The floats sticking in the open position in the fuel reservoir. Possible, but this linkage almost never distorts. Another possibility is a pinhole in the float, especially if the float is hollow soldered metal. Most likely is a worn out needle valve and/or seat. These are included in most carb rebuild kits. After replacing, check the float height against the specs, usually also included with kit.
leaking or cracked manifold
It is probably a vacuum leak. that model doesnt have a carburetor, it has fuel injection. and whining is usually a vacuum leak. it also might cause the engine to "lope" at idle or for it to "surge" when you hold the accelerator steady.
Yes it could if you in fact have a carburetor. Carburetors were fazed out during the 1980's.
if the the river overflows it wont cause any harm by Craig mac
A misfire will cause flames to come out of the carburettor
Most likely, Your float is stuck in the carburetor. If it is stuck open gas will continue to flow into the carburetor bowl, then it will flow into the crank case and cause your oil level to rise. You need to take off your carburetor and adjust the float.
Yes
a carbureator cause there easier to fix
Lots of things
Regulate the carburetor and replace its gasket.
You need to adjust your carburetor.
Your question is a little vague, but here are a couple of ideas for you. The carburetor float is adjusted incorrectly. The carburetor was modified, or replaced with a modified part that doesn't meet the original carburetor specs. A test you can perform to determine if it is the carburetor causing the problem would be to drive the car for 5 miles, then stop and remove one of the spark plugs. It should be a clean leaning to a gray color. Any black sooty stuff on the plug means too much fuel coming from the carburetor. You also need to make sure you did your part correctly. Are all of the vacuum lines connected and in the original positions? Spray some WD-40 around the carburetor while running to see if there is a vacuum leak. The engine will change rpm if there is. Adjust the idle mixture if you haven't already. The carb shop would have set it to manufactures specifications, but may need to be adjusted to your car.