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VACUUM PUMP DIAGNOSIS Basic timing incorrect Reset timing, see FUEL SYSTEMS EGR valve malfunction Replace EGR valve Internal injection pump malfunction Replace injection pump, see FUEL SYSTEMS Incorrect injector pump housing pressure Check pressure, see FUEL SYSTEMS Engine Overheating Cooling system leaks Check cooling system and repair leaks Belt slipping or damaged Check tension and/or replace belt Thermostat stuck closed Remove and replace thermostat, see ENGINE COOLING Head gasket leaking Replace head gasket Oil Light on at Idle Low oil pump pressure Check oil pump operation, see ENGINES Oil cooler or line restricted Remove restriction and/or replace cooler Engine Won't Shut Off Injector pump fuel solenoid does not return fuel Remove and check solenoid and replace if needed CONDITION & POSSIBLE CAUSE CORRECTION Excessive Noise Loose pump-to-drive assembly screws Tighten screws Loose tube on pump assembly Tighten tube
2008 Honda Civic EX GENERAL INFORMATION Trouble Shooting - Basic Procedures
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