Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
Difficult starting	Inoperative or damaged ignition system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged fuel system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged starting system.	Refer to STARTERS for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Damaged charging system/battery.	REFER to BATTERY, MOUNTING & CABLES .
	Burnt valve.	INSTALL a new valve.
	Worn piston.	INSTALL a new short block.
	Worn piston rings.	INSTALL a new short block.
	Worn cylinder.	INSTALL a new short block.
	Damaged head gasket.	INSTALL a new cylinder head gasket.
	Inoperative or damaged cooling system (failsafe cooling invoked).	Refer to ENGINE COOLING for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
Poor idling	Vacuum leaks.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged ignition system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure.
	Inoperative or damaged cooling system (failsafe cooling invoked).	Refer to ENGINE COOLING for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged fuel system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Misadjusted valve lash.	ADJUST valve lash. Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure.
	Incorrect valve-tovalve seat contact.	INSTALL a new cylinder head.
	Damaged head gasket.	INSTALL a new cylinder head gasket.
Abnormal combustion	Inoperative or damaged fuel system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged cooling system (failsafe cooling invoked).	Refer to ENGINE COOLING for the procedure.
	Inoperative or damaged ignition system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Burnt or sticking valve.	INSTALL a new valve.
	Weak or broken valve spring.	INSTALL a new valve spring.
	Carbon accumulation in combustion chamber.	ELIMINATE carbon buildup.
Excessive oil consumption	Leaking oil.	REPAIR oil leakage.
	Inoperative PCV system.	REPAIR or INSTALL new the necessary components.
	Worn valve stem seal.	INSTALL a new valve stem seal.
	Worn valve stem or valve guide.	INSTALL a new valve or cylinder head.
	Sticking piston rings.	INSTALL a new short block.
	Worn piston ring groove.	INSTALL a new short block.
	Worn piston or cylinder.	INSTALL a new short block.
Engine noise	Leaking exhaust system.	REPAIR exhaust leakage.
	Incorrect drive belt tension.	REFER to SPECIFICATIONS & DRIVE BELT ROUTING .
	Worn generator bearing.	Refer to the GENERATORS & REGULATORS for the procedure.
	Worn or damaged water pump bearing.	REFER to ENGINE COOLING .
	Inoperative or damaged cooling system.	REFER to ENGINE COOLING .
	Inoperative or damaged fuel system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Loose timing chain (6268).	ADJUST or INSTALL a new timing chain.
	Damaged timing chain tensioner (6L266).	INSTALL a new timing chain tensioner.
	Excessive main bearing clearance.	INSTALL a new short block.
	Seized or heat damaged crankshaft main bearing.	INSTALL a new short block.
	Excessive crankshaft end play.	INSTALL a new short block.
	Excessive connecting rod bearing clearance.	INSTALL a new short block.
	Heat damaged connecting rod bearing (6211).	INSTALL a new short block.
	Damaged connecting rod bushing (6207).	INSTALL a new short block.
	Worn cylinder.	INSTALL a new short block.
	Worn piston (6108) or piston pin (6135).	INSTALL a new short block.
	Damaged piston rings.	INSTALL new short block.
	Bent connecting rod.	INSTALL a new short block.
	Worn or damaged valve tappet.	INSTALL a new valve tappet.
	Excessive valve tappet or lash adjuster clearance.	ADJUST clearance or INSTALL a new valve tappet.
	Broken valve spring (6513).	INSTALL a new valve spring.
	Excessive valve guide clearance.	INSTALL a new cylinder head.
Insufficient power	Inoperative or damaged ignition system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged fuel system.	Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Inoperative or damaged cooling system (failsafe cooling invoked).	Refer to ENGINE COOLING for the procedure. REFER to SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV .
	Damaged or plugged exhaust system.	INSPECT exhaust system.
	Incorrect tire size.	refer to FRONT or REAR in Suspension .
	Slipping transmission.	Refer to AUTOMATIC TRANSMISSION - 5R55N for the procedure.
	Misadjusted valve lash.	ADJUST valve lash. Refer to SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE for the procedure.
	Worn or damaged valve tappet.	INSTALL a new valve tappet.
	Damaged valve tappet guide.	INSTALL a new cylinder head.
	Compression leakage at valve seat.	INSTALL a new valve, or cylinder head.
	Seized valve stem.	INSTALL a new valve.
	Weak or broken valve spring.	INSTALL a new valve spring.
	Worn or damaged cam.	INSTALL a new camshaft.
	Damaged head gasket (6051).	INSTALL a new head gasket.
	Cracked or distorted cylinder head.	INSTALL a new cylinder head.
	Damaged, worn or sticking piston ring(s).	INSTALL a new short block.
	Worn or damaged piston.	INSTALL a new short block.