Mitsubishi Galant (2004+). Manual - part 950

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-617

STEP 10. Check for leaks in evaporative emission hoses L 
and M.

Use a hand vacuum pump to test each hose L and M.

Q: Do the hoses hold vacuum?

YES :  Go to Step 11.
NO :  Replace any damaged hose. Then go to Step 15.

STEP 11. Check for leaks in evaporative emission hose N.
(1) Remove the fuel tank assembly (Refer to GROUP 13C, 

Fuel Tank 

P.13C-10

).

(2) Use the hand vacuum pump to check the hose N.
Q: Is the hose hold vacuum?

YES :  Go to Step 12.
NO :  Replace the hose and reinstall the fuel tank assembly 

(Refer to GROUP 13C, Fuel Tank 

P.13C-10

). Then go 

to Step 15.

AC306776

AB

HOSE M

HOSE L

<EXCEPT VEHICLES FOR CALIFORNIA 
EMISSION REGULATION>

AC306776

AC307258AB

HOSE M

HOSE L

<VEHICLES FOR CALIFORNIA EMISSION 
REGULATION>

AC305683AB

HOSE N

<EXCEPT VEHICLES FOR CALIFORNIA 
EMISSION REGULATION>

AC307255AB

HOSE N

<VEHICLES FOR CALIFORNIA EMISSION 
REGULATION>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-618

STEP 12. Check for leaks in the fuel tank.

(1) Visually check for cracks or other leaks in the fuel tank.

NOTE: Carefully check the fuel pump module and the fuel 
tank differential pressure sensor installation in the fuel tank.

AC305683AD

<EXCEPT VEHICLES FOR CALIFORNIA 
EMISSION REGULATION>

AC307255AC

<VEHICLES FOR CALIFORNIA EMISSION 
REGULATION>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-619

(2) Connect the evaporative emission system pressure pump  

(Miller number 6872A) to the fuel filler hose.

(3) Plug the hose and the nipple shown in the illustration.

NOTE: If these items are not securely plugged now, the fuel 
could leak in the next step.

(4) Pressurize the fuel tank with the evaporative emission 

system pressure pump.

(5) In the pressurized state, check for leaks by applying a 

soapy water solution to each section and look for bubbles.

Q: Are any leaks found?

YES <When there is a leak from the attachment points of 
the fuel pump module, fuel tank differential pressure 
sensor, fuel level sensor (sub) or leveling valve.> : 

Reassemble the leaked parts and check again that 
there are no leaks. Then reinstall the fuel tank (Refer 
to GROUP 13C, Fuel Tank 

P.13C-10

). Then go to 

Step 15     .

YES <When there is a leak from the fuel tank.> : Replace 

the fuel tank (Refer to GROUP 13C, Fuel Tank 

P.13C-10

). Go to Step 15.

NO :  When there is no leak, reinstall the fuel tank (Refer to 

GROUP 13C, Fuel Tank 

P.13C-10

). Then go to Step 

14.

AC305684

FUEL FILLER 
HOSE

AD

<EXCEPT VEHICLES FOR CALIFORNIA 
EMISSION REGULATION>

AC307256AB

<VEHICLES FOR CALIFORNIA EMISSION 
REGULATION>

FUEL FILLER 
HOSE

AC305684AE

<EXCEPT VEHICLES FOR CALIFORNIA 
EMISSION REGULATION>

AC307256AC

<VEHICLES FOR CALIFORNIA EMISSION 
REGULATION>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-620

STEP 13. Check the evaporative emission canister for 
vacuum leaks.

(1) Remove the evaporative emission canister (Refer to 

GROUP 17, Evaporative Emission Canister and Fuel Tank 
Pressure Relief Valve 

P.17-97

).

(2) Connect a hand vacuum pump to the evaporative emission 

canister and plug the other nipples.

(3) Apply a pressure on the hand vacuum pump, and confirm 

that air is maintained.

(4) Disconnect the hand vacuum pump and remove the plugs, 

and then install the evaporative emission canister (Refer to 
GROUP 17, Evaporative Emission Canister and Fuel Tank 
Pressure Relief Valve 

P.17-97

).

Q: Is the evaporative emission canister in good condition?

YES : Go to Step 14.
NO :  Replace the evaporative emission canister (Refer to 

GROUP 17, Evaporative Emission Canister and Fuel 
Tank Pressure Relief Valve 

P.17-97

). Then go to Step 

15    .

AC305682

AB

PLUGS