4.23
ELECTRONIC FUEL INJECTION
4
9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
DUAL THROTTLE BODY ASSEMBLY
Operation Overview
Mounted to the cylinder head, the dual throttle body
assembly provides the proper air/fuel ratio needed for
engine operation.
The throttle body assembly also includes the Manifold Air
Quality Sensor (MAQS), which provides the ECU with
intake air temperature, manifold absolute pressure and
throttle position.
Throttle Body Service
The throttle body assembly is a non-serviceable
component. However, the fuel rail and fuel injectors can be
serviced separately (see “Fuel Injectors”). The Manifold
Air Quality Sensor (MAQS) attached to the end of the
throttle body is non-serviceable. If the sensor is faulty, the
entire throttle body assembly must be replaced. Refer to
“Throttle Body Removal” procedure.
Throttle Body Removal
1. Remove the cargo box access panel (A).
2. Be sure the engine has cooled enough to work on.
3. Remove the breather hose (B) from the air box and
loosen the hose clamps (C) retaining the air box to the
throttle body assembly.
4. Remove the (2) screws (D) retaining the air box and
loosen the hose clamp (E) retaining the intake hose
to the air box. Remove air box assembly from vehicle.
5. Remove the (2) screws (F) that mount the fuel rail to
the throttle body using a 5 mm Allen wrench.
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