With out a compression test or a cylinder pressure test. It may spit out of the carb or fuel injector air intake.
A pressure test is the best way to find out.
It can be tested at home with an air hose and a good ear.
If your vehicle smokes when you first start it, then quits after running a little your valve seals are shot. Short of that you need a leak down test: Which you can do at home by yourself easily.