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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-661 STEP 8. Check for leaks in evaporative emission hoses H (1) Remove the fuel tank filler tube protector (Refer to GROUP 13C, Fuel Tank (2) Use a hand vacuum pump to test each hose from hose H to hose J. Q: Do the hoses hold vacuum? YES : Go to Step 9. STEP 9. Test check valve. (1) Check valve is a one-way check valve. (2) Check valve should allow air to flow in only one direction. only? tube protector (Refer to GROUP 13C, Fuel Tank ). Then go to Step 15. AC306401 HOSE H AE AC306800 AC HOSE I HOSE J AC306800 AD CHECK VALVE AC306332 AB CHECK VALVE |