280se 4.5 runs rich , idles poorly, accelerates poorly.

Hi Dr Djet, yes every car except low mileage car have the map sensors that are not disturbed. I have many very low mileage 3.5's and 4.5 s in inventory and all of them run fine and the MAP sensors are original.. I think what happens with age is the knowledge is lost and technicians and people do anything to try to get the car running, Very few people have portable CO meters , extra MAP Sensor's and ECU's. I have all the parts for a 3.5 in stock as new but not for a 4.5. These systems were brilliantly made and as the knowledge
is lost it is difficult to maintain the cars. Your website brings us back to some sort of reality to maintain them. thanks.