Mitsubishi Eclipse. Manual — part 554
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-759
STEP 7. Check for leaks in the evaporator line hose F to
hose H.
(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 F to hose H.
Q: Are the hoses in good condition?
YES : Go to Step 8.
NO : Replace that hose, reinstall the fuel tank. (Refer to
GROUP 13C, Fuel Tank
.) Then go to Step
17.
STEP 8. Check for leaks in the evaporative emission
canister.
(1) Connect a hand vacuum pump to the vent nipple of the
evaporative emission canister.
(2) Plug the other two nipples or loop a hose between the other
nipples.
(3) Apply a vacuum with the hand vacuum pump, and confirm
that the applied vacuum does not fluctuate.
Q: Is the evaporation emission canister in good condition?
YES : Go to Step 17.
NO : Replace the evaporative emission canister, reinstall
the fuel tank. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 17.
AC002037
HOSE F
HOSE H
AB
HOSE G
AC000191AB
VENT
NIPPLE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-760
STEP 9. Check for leaks in the evaporator line from hose J
and hose K.
(1) Remove the fuel filler neck protector. (Refer to GROUP
13C, Fuel Tank
(2) Disconnect hose J at the liquid separator, and then connect
a hand vacuum pump to the hose.
(3) Disconnect hose K at the fuel tank side, and then plug the
hose.
(4) Apply vacuum with the hand vacuum pump, and confirm
that the applied vacuum does not fluctuate.
Q: Are the evaporator line in good condition?
YES : Go to Step 10.
NO : Replace that hose, reinstall the fuel filler neck
protector. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 17.
STEP10. Check for leaks in the evaporator line hose I, L, M,
N and O.
(1) Remove the fuel tank and fuel filler neck assembly. (Refer
to GROUP 13C, Fuel Tank
.)
(2) The leakage test with a hand vacuum pump on each hose
from hose I, L, M, N and O.
Q: Are the hoses in good condition?
YES : Go to Step 11.
NO : Replace the hose, reinstall the fuel tank and fuel filler
neck assembly. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 17.
AC02040 AB
HOSE J
AC002038 AB
HOSE K
AC002032
AB
HOSE I
AB
AC002039
AB
AB
HOSE O
HOSE L
HOSE N
HOSE M
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-761
STEP 11. Check the check valve A.
(1) Only when you blow the check valve from the direction
shown, it should pass air.
(2) When you blow the check valve, air should leak from the
check valve body.
Q: Is the check valve A in good condition?
YES : Go to Step 12.
NO : Replace the check valve A, reinstall the fuel tank and
fuel filler neck assembly. Then go to Step 17.
STEP 12. Check the check valve B.
(1) When you blow the check valve from the arrow direction
shown above, it should pass more air.
(2) When you blow the check valve from the arrow direction
shown below, it should pass less air.
(3) When you blow the check valve, air should leak from the
check valve body.
Q: Is the check valve B in good condition?
YES : Go to Step 13.
NO : Replace the check valve B, reinstall the fuel tank and
fuel filler neck assembly. (Refer to GROUP 13C, Fuel
Tank
AC002039
CHECK VALVE A
AE
AC002076 AB
CHECK VALVE A
AC002039
CHECK VALVE B
AF
AC002078
CHECK VALVE B
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-762
STEP 13. Check for leaks in the evaporator line hose P.
(1) The leakage test with a hand vacuum pump on each hose
from hose P.
Q: Is the hose in good condition?
YES : Go to Step 14.
NO : Replace the hose, reinstall the fuel tank and fuel filler
neck assembly. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 17.
STEP 14. Visually check for cracks in the fuel filler neck
assembly.
Visually check for cracks in the fuel filler neck assembly.
Q: Is the fuel filler neck assembly in good condition?
YES : Go to Step 15.
NO : Replace the fuel filler neck assembly, reinstall the fuel
tank and fuel filler neck assembly. (Refer to GROUP
13C, Fuel Tank
.) Then go to Step 17.
STEP 15. 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.
AC000195AB
HOSE P
AC000196
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