<P> 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 ( see stoichiometry ) and influence the advance or retard of ignition timing . A fuel - injected engine may alternatively use a mass airflow sensor ( MAF sensor ) to detect the intake airflow . A typical naturally aspirated engine configuration employs one or the other , whereas forced induction engines typically use both ; a MAF sensor on the intake tract pre-turbo and a MAP sensor on the charge pipe leading to the throttle body . </P>
<P> 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 ( see stoichiometry ) and influence the advance or retard of ignition timing . A fuel - injected engine may alternatively use a mass airflow sensor ( MAF sensor ) to detect the intake airflow . A typical naturally aspirated engine configuration employs one or the other , whereas forced induction engines typically use both ; a MAF sensor on the intake tract pre-turbo and a MAP sensor on the charge pipe leading to the throttle body . </P>
what does a map sensor do for a car
what does a map sensor do for a car
provides instantaneous manifold pressure information to the engine 's electronic control unit ( ECU )
provides instantaneous manifold pressure information to the engine 's electronic control unit ( ECU )