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6A–14 ENGINE MECHANICAL Condition Correction Possible cause Trouble in emission control system Heated Oxygen Sensor circuit open Correct or replace Heated Oxygen Sensor defective Replace Signal vacuum hose loosely fitted or Correct or replace EGR Valve circuit open or shorted Correct or replace Exhaust Gas Recirculation Valve Replace ECT Sensor circuit open or shorted Correct or replace Canister Purge Valve circuit open or Correct or replace Canister Purge Valve defective Replace ECT Sensor defective Replace Positive Crankcase Ventilation Correct or replace Evaporator system Refer to Section 6E Trouble in ignition system ———— Refer to “Engine Lacks Power” Trouble in cylinder head parts Carbon deposits in combustion Remove carbon Carbon deposit on valve, valve seat Remove carbon Engine Oil Consumption Excessive Condition Possible cause Correction Oil leaking Oil pan drain plug loose Retighten or replace gasket Crankcase fixing bolts loosened Retighten Oil pan setting bolts loosened Retighten Oil pan gasket broken Replace gasket Front cover retaining bolts loose or Retighten or replace gasket Head cover fixing bolts loose or Retighten or replace gasket Oil cooler adapter cracked Replace Oil cooler center bolt loose Retighten Oil cooler O–ring broken Replace Oil cooler piping loose or broken Retighten or replace Oil filter adapter cracked Replace Oil filter attaching bolt loose or rubber Retighten or replace oil filter Oil cooler broken Replace Crankshaft front or rear oil seal Replace oil seal Oil pressure unit loose or broken Retighten or replace Blow–by gas hose broken Replace hose Positive Crankcase Ventilation Valve Clean Engine/Transmission coupling failed Replace oil seal |