Arctic Cat 2015 ZR 5000 Service Manual page 118

Removing (5000/9000)
WARNING
Since the fuel supply hose may be under pressure, remove
it slowly to release the pressure. Place an absorbent
towel around the connection to absorb gasoline; then
remove the hose slowly to release the pressure. Always
wear safety glasses when removing the fuel hoses.
1. Loosen the clamp securing the fuel supply hose to
the fuel rail; then remove the hose from the fuel rail.
2. Disconnect the wiring harness from each injector.
3. Remove the screws securing the injector hold-down
plate to the throttle body assembly; then remove the
plate from the injectors.
4. Remove the fuel injectors from the throttle body/
intake manifold assembly.
Installing (5000/9000)
1. Apply a light coat of oil to all O-rings; then install
the upper and lower O-rings onto each injector.
2. Install the injectors into the throttle body assembly.
3. Place the injector hold-down plate into position on
top of the injectors and secure with two screws.
4. Connect the fuel delivery hose to the fuel rail and
secure with a clamp.
 NOTE: When securing the fuel delivery hose, posi-
tion the clamp as shown.
5. Connect the wiring harness to the injectors.
Removing (7000)
WARNING
Since the fuel supply hose may be under pressure, remove
it slowly to release the pressure. Place an absorbent
towel around the connection to absorb gasoline; then
remove the hose slowly to release the pressure. Always
wear safety glasses when removing the fuel hoses.
1. Remove the orange clamp securing the fuel supply
hose to the fuel rail.
2. Disconnect the wiring harness from each injector.
3. Remove the cap screws and washers securing the
fuel rail to the throttle body assembly; then remove
the rail from the injectors. Account for two washers
and two spacers.
116
4. Remove the fuel injectors from the throttle body
assembly. Account for six grommets.
Installing (7000)
1. Apply a light coat of oil to all six grommets; then
install onto each injector.
2. Install the injectors into the throttle body assembly.
3. Place the fuel rail into position on top of the injectors
and secure with existing spacers, washers and cap
screws.
4. Connect the fuel delivery hose to the fuel rail and
secure with the orange clamp.
5. Connect the wiring harness to the injectors. Cable tie
as needed.
FUEL PRESSURE REGULATOR
729-325
The fuel pressure regulator maintains the fuel pressure at
a constant specified level. The 9000 models maintain
pressure from the manifold pressure.
EXHAUST AIR TEMPERATURE (EAT)
SENSOR
This platinum, thin-film sensor detects the exhaust air
temperature in the exhaust system. The ECM sends cur-
rent to this sensor, and (depending on the temperature)
the sensor will pass a portion of that current to ground.
The ECM measures how much current passes through the
sensor to ground. From this measurement, the ECM
determines the exhaust air temperature and adjusts the
fuel, ignition timing, and APV calibration. Resistance
will increase as the temperature rises.
SNO-369
SNO-369