I want to thank Marky Dissod honored member here on the forum for doing fantastic PCM upgrades for me. He is quite adept at optimizing OBD I PCMs to suit my needs. He has boosted performance, economy and drivability by addressing shift points, cooling fan thresholds, A.I.R. pump function delete, A/C efficiency and other aspects that are interrelated. My most recent emissions was Hydrocarbons loaded: 1ppm (220 allowed). Idle: 0 ppm. Carbon Monoxide loaded: 00.00 % (1.20 % allowed) and idle: 00.00% Not bad for a 25 year old car.