Mitsubishi Galant. Manual — part 276
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-329
STEP 15. Check for leaks in the evaporator line from hose
J to hose K.
(1) Disconnect hose J at the liquid separator side, and then
connect a hand vacuum pump to the hose.
(2) Disconnect hose K at the fuel tank side, and then plug the
hose.
(3) Apply vacuum by using the hand vacuum pump.
Q: Is the vacuum maintained inside the evaporator line?
YES : Go to Step 16.
NO : Go to Step 19.
STEP 16. Check for leaks in the evaporator line from hose
P.
(1) Remove the fuel tank. (Refer to GROUP 13C, Fuel
Tank
(2) The leakage test with a hand vacuum pump on each hose
from hose P.
Q: Can the leaks be pinpointed?
YES : Replace that hose. Then go to Step 32.
NO : Go to Step 17.
AC02040 AB
HOSE J
AC002038 AB
HOSE K
AC000195AB
HOSE P
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-330
STEP 17. Check for leaks in the fuel tank.
(1) Visually check for cracks and leaks, etc.
NOTE: Carefully check the fuel pump assembly and the
inner pressure sensor installation section in the fuel tank.
(2) Connect an evaporative emission system pressure pump to
the leveling valve nipple.
(3) Plug the filler hose, feed pipe, return pipe and rollover valve
nipple connected to the fuel tank.
NOTE: If these items are not securely plugged here, the
fuel could leak in the next step.
(4) Apply pressure with the evaporative emission system
pressure pump.
(5) In the pressurized state, check for the leak by applying soap
water, etc. to each section.
Q: Can the leaks be pinpointed?
There is leaks at the fuel pump assembly or the inner
pressure sensor installation section : Reassemble the
parts, check again that there are no leaks, reinstall
the fuel tank. Then go to Step 32.
There is leaks at another section : Go to Step 18.
STEP 18. Visually check for cracks in the fuel tank filler
neck.
(1) Visually check for cracks in the fuel tank filler neck.
Q: Can the leaks be found out?
YES : Replace the fuel tank filler neck assembly and
reinstall the fuel tank. Then go to Step 32.
NO : Reinstall the fuel tank.Then go to Step 32.
AC000196
AC000197
AC000198
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-331
STEP 19. Check for leaks in the evaporator line from hose
J to hose K.
(1) The leakage test with a hand vacuum pump on each hose
from hose J to hose K.
Q: Can the leaks be pin pointed?
YES : Replace that hose, and go to Step 32.
NO : Go to Step 32.
STEP 20. Check for clogging in the evaporator line from
hose G to hose I.
(1) Unplug the hose G.
(2) On the EVAP pressure pump, set the pressure/hold valve to
OPEN, and set the vent valve to CLOSED. Turn the pump
timer to ON. You can reset the timer as required. (These
settings are listed under "Leak Test" in the pump
instructions.)
(3) Air should pass through hose G.
Q: Does air pass through hose G?
YES : Go to Step 24.
NO : Go to Step 21.
AC002033 AB
HOSE K
HOSE J
OPEN
OPEN
CLOSED
CLOSED
Pressure
Hold
Vent
ACX01806
AC002029 AB
HOSE G
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-332
STEP 21. Check for clogging in the evaporator line from
hose I to hose P.
(1) Disconnect hose I from the evaporative emission canister
side, and unplug the hose I.
(2) On the EVAP pressure pump, set the pressure/hold valve to
OPEN, and set the vent valve to CLOSED. Turn the pump
timer to ON. You can reset the timer as required. (These
settings are listed under "Leak Test" in the pump
instructions.)
(3) Air should pass through hose I.
Q: Does air pass through hose I?
YES : Go to Step 22.
NO : Go to Step 27.
STEP 22. Check for clogging in the evaporator line from
hose H and G.
(1) Remove the fuel tank. (Refer to GROUP 13C, Fuel
Tank
(2) The clogging test with a hand vacuum pump on each hose
from hose H and hose G.
Q: Are there any clogs?
YES : Replace that hose, and perform the OBD-II drive
cycle
NO : Go to Step 23.
AC002036 AB
HOSE I
OPEN
OPEN
CLOSED
CLOSED
Pressure
Hold
Vent
ACX01806
AC002037
HOSE H
AD
HOSE G
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