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hi all , help me !!!! , my s reg 206 revs like mad at idle (red lines then dips to normal , then redlines etc ), when a friend disconected the map sensor it runs ok but lumpy , any ideas..?? what is a map sensor anyway lol
 

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A manifold absolute pressure sensor (MAP) is one of the sensors used in an internal combustion engine's electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's electronic control unit (ECU). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion . A fuel-injected engine may alternately use a MAF (mass air flow) sensor to detect the intake airflow. A typical configuration employs one or the other.but both could be used in some cases
 
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