10 - 2
TRBL
SHTG
STARTING FAILURE/HARD STARTING/POOR IDLE SPEED
PERFORMANCE/POOR MEDIUM AND HIGH-SPEED PERFORMANCE
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
Valves, 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
• 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