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Question Answered: Sudden loss of power
December 22, 2010, 03:57 PM
Have you analyzed the o2 and mass air flow sensors? My 93' 600sel has the same problem and when analyzed by the dealer I was told it was more than likely the mass air flow sensor, or O2 sensors, or throttle motors. I replaced the O2 sensors first with little success. Then I replaced the mass air flow sensor on the passenger side which helped a great deal but not entirely. When the budget allows I'm replacing the drivers side mass air flow sensor. I hope that does it, because the dealer price on the throttle motors is about $7,000. If they need replacing.....the car will become a parts vehicle. When the car balks like you describe, turn off the cruise-put it in neutral, and restart it. It should run correctly for a while to get you out of trouble on the road. Happened to me during rush hour on the I-system in downtown St. Louis......scary!
Problem Reported: Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy
September 15, 2010, 10:07 PM

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

Problem Reported: Radiators Break Due to Degradation of the Plastic Tanks and Fittings
September 15, 2010, 10:06 PM

A coolant leak may develop form the Radiator due to degradation of its plastic components. Replacement of the failed radiator will be necessary.

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