Question about 1993 Mazda 626

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My rpm drops as I accelerate speed over 300 rpm reading. The rpm drops-down badly & very fast. The engine sometimes stops. I need to re-start the engine once power lost. The car cannot climb on steep roads also because as I accelerate speed the rpm continue to drop badly. What's the problem? Is it with the servo? or with my automatic transmission? Please help.... Thanx

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Indicates that an over rpm sensor is activating
run the fault codes to determine the area of the fault then fix what is reported

Posted on Sep 06, 2017


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Posted on Jan 02, 2017

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Hi, Does the car have a problem changing gears? Does the RMP fluctuate rapidly? By the way, I have the same car. I encounter almost the same problem as you. The mechanic put the car under diagnostic and that I needed to change three sensors. Of course I did not agree to that because logically it did not make sense that all three sensor failed. I took the car to another shop, they said the same thing. I am very stubborn so I did not have them change the sensors. I know the problem could be from lack of oxygen or fuel. I decide to clean the MAP sensor. As soon as I clean the sensor, the car start to run like it was a brand new car. The HP increased, the pick up increased. All because the dust built-up blocked the sensor from given an acurate reading. Let me know if your RMP is fluctuate rapidly. Thanks, Mike

Posted on Nov 05, 2008

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SOURCE: Mazda Eunos dropping out of gear at speed - clutch or gearbox?

gear box

Posted on Apr 19, 2009

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