Operation Section 62 Problem Probable Cause Corrective Action Excessive Fuel Consumption/LP G Exhaust Smell Air/Fuel Mixer malfunction Check mixer z See Engine Service Manual Air filter clogged Check air filter z Clean/replace as required Vacuum leak Check system vacuum hoses from regulator to FTV and mixer z Repair/replace as necessary Pressure regulator malfunction/fuel pressure too high Test pressure regulator operation z See Engine Service Manual Faulty FTV Check FTV for housing cracks or obstructions z See Advanced Diagnostics FTV operation z Repair and/or replace as necessary Weak ignition and/or spark control See Advanced Diagnostics Incorrect air/fuel control See Advanced Diagnostics Exhaust system leaks Repair exhaust system Oxygen sensor failure Replace as necessary z See Advanced Diagnostics