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below 1 Check the A/F sensor (see REMOVAL ) and heated oxygen sensor (see ON-VEHICLE 2 See the table below for possible causes, and then inspect and correct the applicable causes if SYMPTOM TABLE DRIVE BELT COMPONENTS CO HC Symptom Cause Normal High Rough idle 1 Faulty ignitions: Incorrect timing Plugs (contaminated, shorted or gaps 2 Incorrect valve clearance 3 Leaky intake and exhaust valves 4 Leaky cylinder Low High Rough idle (Fluctuating HC 1 Vacuum leaks: PCV hose Intake manifold Throttle body Brake booster line 2 Lean mixture causing misfire High High Rough idle (Black smoke 1 Restricted air filter 2 Faulty SFI system: Faulty pressure regulator Defective ECT sensor Faulty ECM Faulty injectors Faulty throttle position sensor Faulty MAF meter
2009 Toyota Tundra 2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra
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