99 cougar fuel problems. not the gas cap.?

Anytime the check engine light is lit, there is a problem that needs to be diagnosed. Take the car to an auto parts store and have them hook up the OBD reader; this will show the codes and reading the codes will indicate the repairs needed. It's the only way to find out why the light is lit - all other is guesses. Also be careful - using foul language on YA is against their guidelines and may have the Q deleted