About a week ago puller codes from my car (90 GT) either a (KOEO) 1, 22, or 122 not sure code 29,33,96. KOER was 21,41,33. When I got the car no heater it wouldn't change from the floor to the vent...always the defrost. I got parts to fix each thing instead of a new EGR got the sensor it was a...