Electronic Fuel Injection (425); Air Filter - Arctic Cat 350 2011 Service Manual

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5. Install the gas tank (see Gas Tank in this section).
Electronic Fuel Injection
(425)
! WARNING
Whenever any maintenance or inspection is per-
formed on the fuel system during which there may be
fuel leakage, there should be no welding, smoking,
open flames, etc., in the area.
TROUBLESHOOTING
1. Verify that the electric fuel pump is operating by
listening for a "whirring" sound for several sec-
onds after the ignition switch is turned to the ON
position. If no sound can be heard, see Electric
Fuel Pump/Fuel Level Sensor (425) in this section.
2. Check for a flashing EFI icon on the LCD. If EFI
is flashing, see ECU Error Codes (425) in Section
5.
3. Make sure there is sufficient, clean gas in the gas
tank.
4. Verify that the battery is sufficiently charged to
crank the engine over at normal speed.
5. Check the air filter housing and air filter for con-
tamination. Clean or replace as necessary (see
Section 2).
Throttle Body (425)
REMOVING
1. Remove the heat shields and seat.
KC257
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Manual
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1. Disconnect the negative battery cable; then
remove the gas tank (see Gas Tank in this section).
! WARNING
Gasoline may be under pressure. Place an absorbent
towel under the connector to absorb any gasoline
spray when disconnecting.
2. Loosen the clamp securing the intake boot to the
throttle body; then loosen the clamp securing the
intake boot to the intake housing and slide the
intake housing rearward.
3. Disconnect the MAP/IAT sensor connector, ISC
connector, and TPS connector; then loosen the
clamp securing the throttle body to the intake man-
ifold boot and slide the throttle body out.
4. Remove the throttle arm cover and loosen the
throttle cable jam nut; then disconnect the throttle
cable and remove the throttle body.
INSTALLING
1. Connect the throttle cable to the throttle arm; then
install the throttle cable housing in the throttle
body and tighten the jam nut. Install the throttle
arm cover and secure with two machine screws.
2. Place the throttle body into the intake manifold
boot and tighten the boot clamp securely.
3. Place the intake housing into the boots and tighten
the boot clamps securely.
4. Install the gas tank; then the heat shields and seat.
Section
Table of Contents
4
FI691A
FI528A
4-9