Exploder problems

[grey88gt]

Well Ive checked tire pressure, tires look fine, no abnormal wear any where, has new air filter, fuel filter, . As far as tune up goes it dosnt have a dizzy, so cap or rotor not needed, The wires look great, has no miss fire. I havent checked the plugs yet. The brakes are fine, checked them when I rotated the tires. The trans is shifting fine, and you can feel it lock the converter in 3rd and overdrive. I can see cleaning the carbon from the injectors, that might help some. Like I said , it runs great, starts great, no surging, runs perfect just gets bad fuel mileage. Whats up with the air induction service? Mass air meter, MAP sensor (barometric sensor on mass air setup which it has) IAC valve, If any of these were causing an issuse it should be running badly. Thanks