COMPRESSION SYSTEM Cylinder and cylinder head Loose spark plug Loose cylinder head or cylinder Broken cylinder head gasket Broken cylinder gasket Worn, damaged or seized cylinder Valve, camshaft and crankshaft Improperly sealed valve Improperly contacted valve and valve seat Improper valve timing Broken valve spring Seized camshaft Seized crankshaft Piston and piston rings Improperly installed piston ring Worn, fatigued or broken piston ring Seized piston ring Seized or damaged piston Crankcase and crankshaft Improperly seated crankcase Seized crankshaft Valve train Improperly adjusted valve clearance Improperly adjusted valve timing EBS00538 POOR IDLE SPEED PERFORMANCE POOR IDLE SPEED PERFORMANCE Throttle body Damaged or loose throttle body joint Improperly adjusted idle speed (throttle stop screw) Improper throttle cable play Flooded throttle body Electrical system Faulty spark plug Faulty ECU Faulty crankshaft position sensor Faulty ignition coil Valve train Improperly adjusted valve clearance Air filter Clogged air filter element EBS00539 POOR MEDIUM AND HIGH-SPEED PERFORMANCE POOR MEDIUM AND HIGH-SPEED PERFORMANCE Refer to “STARTING FAILURE/HARD STARTING” and “POOR IDLE SPEED PERFORMANCE”.
Fuel pump Faulty fuel pump Air filter Clogged air filter element 10 - 2 STARTING FAILURE/HARD STARTING/POOR IDLE SPEED PERFORMANCE/POOR MEDIUM AND HIGH-SPEED PERFORMANCE TRBL SHTG