on my 95 legacy L wagon ,a/t 2.2 , 165,000mi , no codes, mpg is only 19 , new oem plugs, /wires, fuel filter, air filter, cleaned maf, cleaned egr, new cooplant temp, different tps, new crank sensor, new pvc, could i have the tps not adjusted right or needing 02 front sensor, or needing a new cat,