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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-333 STEP 23. Check for clogging in the evaporative emission evaporative emission canister. (2) Plug the other two nipples or loop a hose between the other nipples. (3) Apply a vacuum, when each nipple is unplugged, the vacuum should fluctuate. Q: Does the vacuum pump gauge reading fluctuate? YES : Reinstall the fuel tank. Then go to step 32. the fuel tank. Then perform the OBD-II drive STEP 24. Check for clogging in the evaporator line hose F. connect a hand vacuum pump to hose F at the floor pipe (2) Apply vacuum. NOTE: The vacuum should be 40 kPa (5.8 psi) or less. (3) Use scan tool MB991502 to activate the evaporative emission purge solenoid valve. The vacuum should leak. Q: Is the vacuum maintained inside the evaporator line? YES : Go to Step 25. STEP 25. Check for clogging in the evaporator line hose C from hose C to hose E. Q: Are there any clogs? YES : Replace that hose, and perform the purgeflow check. (Refer to GROUP 17, Purge Control System .) NO : perform the OBD-II drive cycle . AC000191AB VENT AC000227 HOSE F AB AC002074 HOSE C AC AC002284 AB HOSE D HOSE E |