I have an 87 that has been switched to mass air. Its running rich and i cant find out why. I have pulled codes and comes back code 11 which i understand is system ok. It idles fine and runs fine. I have checked the mass air sensor, 02 sensor, TPS sensor, IAC sensor, and the coolant temp sensor and all read good. The fuel pressure regulator is set at about 38psi without the vacuum line connected. Any help will be greatly appreciated.