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MAF Sensor bad??? 850 1994

My car started running poorly, no power, spitting and sputtering. I read the codes and found 121 Mass Air Flow (MAF) signal missing or faulty. I disconnected it and the car ran pretty good down the road but won't idle. Is there any way to clean these sensors before I spend the money to get a new one? Would this sensor also be the culprit for my gas mileage going from 26 to 13 and the slight smell of rotten eggs?






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