My '94 530i will not run with the MAF sensor connected. It idles as if the timing or mixture is way off. Eventually, it dies. Upon playing with it I discovered if I electrically disconnected the MAF sensor the car would run fine. (After it warmed up a little.) I replaced the MAF sensor and the same thing happens. Obviously, it is not the sensor. I can not pull any codes out of the ecu. (I don't seem to have the knack for the 5 floorings of the accelerator in 5 seconds.) The check engine light is not lit with the MAF connected but does illuminate when the MAF sensor is disconnected. Any ideas as to what is wrong?

Maybe this is another clue, I get great gas mileage without the MAF sensor when on the highway; 28MPG. Normally it is about 24.5 on the highway.

Any help would be appreciated!

Mark