Mitsubishi Eclipse. Manual — part 549
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-739
STEP 7. Check for leaks in the evaporator line from 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 the inferior hose, and reinstall the fuel tank.
(Refer to GROUP 13C, Fuel Tank
.) Then go
to Step 26.
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 air is maintained.
Q: Is the evaporative emission canister in good condition?
YES : Go to Step 26.
NO : Replace the evaporative emission canister (Refer to
GROUP 17, Evaporative Emission Canister and Fuel
Tank Pressure Relief Valve
,) and reinstall
the fuel tank. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 26.
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-740
STEP 9. Check for leaks in the evaporator line from hose J
to hose K.
(1) Remove the fuel tank. (Refer to GROUP 13C, Fuel Tank
(2) Disconnect hose J at the liquid separator side, and then
connect a hand vacuum pump to the hose.
(3) Plug the hose K at the fuel tank side.
(4) Apply vacuum by using the hand vacuum pump, and
confirm that the applied vacuum does not fluctuate.
Q: Is air maintained?
YES : Go to Step 10.
NO : Replace the inferior hose, and reinstall the fuel tank.
(Refer to GROUP 13C, Fuel Tank
.) Then go
to Step 26.
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 inferior hose, reinstall the fuel tank and
fuel filler neck assembly. (Refer to GROUP 13C, Fuel
Tank
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-741
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 check valve A in good condition?
YES : Go to Step 12.
NO : Replace the check valve A, and reinstall the filler neck
assembly. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 26.
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 check valve B in good condition?
YES : Go to Step 13.
NO : Replace the check valve B, and reinstall the filler neck
assembly. (Refer to GROUP 13C, Fuel Tank
.) Then go to Step 26.
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-742
STEP 13. Check for leaks in the evaporator line from hose
P.
(1) The leakage test with a hand vacuum pump on the hose P.
Q: Is the hose P in good condition?
YES : Go to Step 14.
NO : Replace the hose N, and reinstall the fuel tank. (Refer
to GROUP 13C, Fuel Tank
.) Then go to
Step 26.
STEP 14. 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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