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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-643 STEP 16. Check for leaks in the evaporative emission GROUP 17, Evaporative Emission Canister and Fuel Tank (2) Connect a hand vacuum pump to the vent nipple of the evaporative emission canister. (3) Plug the other two nipples or loop a hose between them. the canister holds vacuum. Q: Does the evaporative emission canister hold vacuum? YES : Reinstall the evaporative emission canister. (Refer to GROUP 17, Evaporative Emission Canister and Fuel ). Go to Step 17 . NO : Replace the evaporative emission canister. (Refer to GROUP 17, Evaporative Emission Canister and Fuel ). Go to Step 18 . |