MY engine revs but it will not start what is the problem and how can i fix it?

 

im assuming you mean it cranks but will not start? if so, check your fuel pressure and make sure you got any. theres a little valve on your fuel rail under your air cleaner box. open that valve, stick a small screwdriver in there and have someone crank the ignition from inside the car. some fuel should spray out. it will make a little bit of a mess but wont hurt anything. post up your results