Suzuki 2006 SX4 Service Manual page 95

Condition
Poor gasoline mileage
Excessive engine oil
consumption – Oil
leakage
Excessive engine oil
consumption – Oil
entering combustion
chamber
Engine hesitates –
Momentary lack of
response as accelerator
is depressed. Can occur
at all vehicle speeds.
Usually most severe when
first trying to make
vehicle move, as from a
stop sign
Possible cause
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.)
High idle speed
Poor performance of ECT sensor or
MAF sensor
Faulty electric throttle body assembly
Faulty APP sensor assembly
Faulty fuel injector(s)
Faulty ECM
Low compression
Poor valve seating
Dragging brakes
Slipping clutch (M/T model)
Thermostat out of order
Improper tire pressure
Fuel pressure out of specification
Blown cylinder head gasket
Leaky camshaft oil seals
Sticky piston ring
Worn piston and cylinder
Worn piston ring groove and ring
Improper location of piston ring gap
Worn or damaged valve stem seal
Worn valve stem
Spark plug faulty or plug gap out of
adjustment
Fuel pressure out of specification
Poor performance of ECT sensor or
MAF sensor
Faulty electric throttle body assembly
Faulty APP sensor assembly
Faulty fuel injector
Faulty ECM
Engine overheating
Low compression
Engine General Information and Diagnosis:
Correction / Reference Item
"Spark Plug Inspection in Section 1H"
Condition "Improper engine idling or engine
fails to idle"
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C" or "Mass Air Flow
(MAF) and Intake Air Temperature (IAT)
Sensor Inspection in Section 1C"
"Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C"
"Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C"
"Fuel Injector Circuit Check"
"Inspection of ECM and Its Circuits"
"Compression Check in Section 1D"
"Valves and Valve Guides Inspection in
Section 1D"
"Brakes Symptom Diagnosis in Section 4A"
"Clutch System Symptom Diagnosis in Section
5C"
"Thermostat Inspection in Section 1F"
"Tires Description in Section 2D"
"Fuel Pressure Check"
"Cylinder Head Inspection in Section 1D"
"Camshaft, Tappet and Shim Inspection in
Section 1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Disassembly and Reassembly in
Section 1D"
"Valves and Valve Guides Inspection in
Section 1D"
"Valves and Valve Guides Inspection in
Section 1D"
"Spark Plug Inspection in Section 1H"
"Fuel Pressure Check"
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C" or "Mass Air Flow
(MAF) and Intake Air Temperature (IAT)
Sensor Inspection in Section 1C"
"Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C"
"Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C"
"Fuel Injector Circuit Check"
"Inspection of ECM and Its Circuits"
Condition "Engine overheating"
"Compression Check in Section 1D"
1A-51