Engine Noise
- Check engine mechanical condition. Check compression, camshaft, valve train components, etc. Repair as necessary. See appropriate article in ENGINES.
- Chirp, Click, Grind, Rumble Or Squeal
Check for loose or worn drive belts, or accessory drive components. - Rattle
Check for loose components. - Hiss
Check cooling system and vacuum distribution system for leaks. Check for loose spark plugs. Check intake air system. See TEST HU: AIR INTAKE & THROTTLE BODY under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article. Also check EVAP system. See TEST HX: EVAPORATIVE EMISSION SYSTEM under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article or EVAPORATIVE EMISSION SYSTEM TESTS in SYSTEM & COMPONENT TESTING - VILLAGER article. - Snap
Check secondary ignition system. See TEST JB: IGNITION MISFIRE UNDER LOAD under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article. - Rap Or Roar
Check exhaust system. See TEST HF: CATALYST EFFICIENCY MONITOR & EXHAUST SYSTEMS , step 5) under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article. - Knock
Check for detonation (spark knock). See SPARK KNOCK . Also check for worn connecting rod bearings, worn main bearings, loose piston pins, or excessive piston to cylinder bore clearance.