Air Intake & Fuel Sensors

About Air Intake & Fuel Sensors

A manifold absolute pressure sensor, or MAP sensor, reads the air pressure inside the intake manifold. The engine control unit uses that reading, along with other sensor inputs, to work out engine load and set the fuel it delivers. Riders replace one when a fault code points to it, when the bike runs poorly, or when a sensor is damaged.

The one listing here is a Manifold Absolute Pressure Sensor rated 2 BAR from Daytona Twin Tec. The BAR figure is the sensor's measuring range. Use a sensor whose range and connector suit your ECU or tuning system, because the control unit is set up to read a particular signal and a different range would change what it sees. Make sure the connection to the manifold is tight, since a vacuum leak can give false readings.

The brand here is Daytona Twin Tec. For related parts see Fuel Injectors, Air Filters and the rest of Air Intake & Fuel Delivery.

FAQs on MAP sensors

What does a MAP sensor do on a motorcycle?

A MAP sensor measures the pressure in the intake manifold and sends that signal to the engine control unit. The control unit uses it, with other inputs, to judge engine load and adjust fuel delivery and, on some systems, ignition timing.

How can I tell if a MAP sensor is failing?

Signs include rough idle, hesitation, and running too rich or too lean, but other faults cause the same symptoms. Check for fault codes, inspect the connector and wiring, and look for a vacuum leak before replacing the sensor.

Can I replace a MAP sensor with one that has a different range?

Not safely by guess. The control unit expects the signal from a particular sensor range, and a different range changes the readings. Use the sensor the maker specifies, or one that your tuning system says is compatible.

Is a MAP sensor the same as a throttle position sensor?

No. A MAP sensor measures pressure in the intake manifold, while a throttle position sensor measures how far the throttle is open. Both feed the control unit, but they are different parts and are not interchangeable.