Arctic Cat 2014 M 2-STROKE Service Manual page 97

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
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.
6000
Removing
1. With both access panels, hood, seat, and the gas tank
removed, remove the nuts securing the fuel rail to the
back of the cylinders.
94
2. Pull the fuel rail with the injectors from the cylinders
and disconnect the wiring harness from each injector.
3. Carefully remove the injector from the fuel rail.
Account for both gaskets.
Installing
 NOTE: If installing new injectors, be sure to leave
the tag on the injector(s) as the codes A and B and
the cylinder (MAG or PTO side) must be entered
using the CATT II Tool.
1. Lightly oil the injector seals using the C-TEC2
engine oil; then carefully install the injector into the
fuel rail.
2. Connect the wiring harness to the injectors; then
install the fuel rail with injectors into the back of the
cylinders. Secure using the existing nuts. Tighten to
102 in-lb.
FUEL PRESSURE REGULATOR
The fuel pressure regulator maintains the fuel pressure at
a constant specified level. The turbo models maintain
pressure from the manifold pressure.
729-325A
EXHAUST TEMPERATURE 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.
FUEL PUMP CIRCUIT
The fuel pump and its circuit are provided with current
from the fuel pump coil on the stator. For this circuit to
function correctly, five components must be properly
functioning. Check the following components before
considering the fuel pump assembly to be defective.
A. Fuel pump coil - see coil test procedure.
CWI-106
B. Emergency stop switch and ignition switch must
be ON.
C. Fuel pump - see fuel pump test procedure.
D. Wiring harness and connectors - clean the connec-
tors and test the harness.
SNO-1235A