Arctic Cat M 8000, Service Manual

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FZ001D
FZ003B

NOTE: For codes ECM 16 and ECM 18, see Servo-
motor/Potentiometer Test in the Electrical Systems
section.
The fuel system and the ignition system remain two sepa-
rate systems. In a no-start situation, first determine if the
problem is caused by lack of spark or by a fuel delivery
problem or by an internal engine condition (low cylinder
compression for example).
Once the problem area has been determined, check the
components involved using the Fluke Model 77 Multi-
meter or the EFI Analyzer depending on the test being
made.
Fuel Pressure Regulator
1. Using the Fuel Pressure Test Kit, connect the tester
to the regulator fuel inlet.
 NOTE: A short piece of 3/8 in. I.D. hose will be
needed to make the above connections.
2. Pressurize the regulator to 28-31.3 psi. Turn the pres-
sure tester shut off valve to the OFF position.
Observe the gauge for several minutes and note any
loss of pressure. If pressure begins to drop, the cause
may be a ruptured diaphragm, worn spring, or leak-
ing valve. If the regulator fails to build or maintain
pressure, replace the regulator.

NOTE: If the pressure drops, check the hose con-
nections to ensure no leaks exist.
Throttle Body Assembly
REMOVING
4000/8000

NOTE: The expansion chamber, shock mount
bracket support and air silencer must be removed for
this procedure (see the Engine-Related Items section).
1. Disconnect the wiring harness from each injector and
from the throttle position sensor.
2. Remove the coolant hoses from the throttle body
assembly and plug them to prevent leakage.
3. Remove the fuel supply hose from the fuel rail.
4. Loosen the flange clamps.
5. Remove the oil pump control rod.
6. Slide the throttle body assembly out of the flanges;
then loosen the jam nut securing the throttle cable
and remove.
7. Remove the throttle body assembly.
6000

NOTE: The expansion chamber, shock mount
bracket support and air silencer must be removed for
this procedure (see the Engine-Related Items section).
1. Disconnect the TPS from the wiring harness.
2. Remove both hoses securing the ISC to the throttle
body; then remove the coolant hoses from the throt-
tle body assembly and plug them to prevent leakage.
3. Loosen the clamps securing the throttle body assem-
bly to the intake manifolds. Slide the throttle body
assembly out of the manifolds; then loosen the jam
nut securing the throttle cable and remove.
4. Remove the throttle body.
Code Trouble
2 Failure in injector(s).
4 Open or short circuit in barometric pressure sensor circuit.
5 Open or short circuit in intake air temperature sensor circuit.
6 Open or short circuit in water temperature sensor circuit.
7 Open or short circuit in throttle position sensor circuit.
12 Failure in ignition coil(s).
16 Incorrect adjustment/failure in APV cable.
17 Failure in exhaust temperature sensor circuit.
18 Failure in servomotor.
21 Open or short circuit and/or loose knock sensor circuit.
OCTN Low octane gasoline.
Deluxe Gauge
Standard Gauge
WARNING
Since the fuel supply hose may be under pressure,
remove it slowly to release the pressure. Place an absor-
bent 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.