Suzuki Ignis Service Manual page 3227

6-26 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Condition
Overheating
Poor gasoline mile-
age
Possible Cause
Inoperative thermostat
Poor water pump performance
Clogged or leaky radiator
Improper engine oil grade
Clogged oil filter or oil strainer
Poor oil pump performance
Faulty radiator fan control system
Dragging brakes
Slipping clutch
Blown cylinder head gasket
Leaks or loose connection of high-tension
cord
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.)
Malfunctioning EGR valve
High idle speed
Poor performance of TP sensor, ECT sensor
or MAF sensor
Faulty fuel injector(s)
Faulty ECM
Low Compression
Poor valve seating
Dragging brakes
Slipping clutch
Thermostat out of order
Improper tire pressure
VVT system out of order
Reference Item
"Thermostat Inspection" in Section 6B.
"Water Pump Inspection" in Section 6B.
"Radiator Inspection" in Section 6B.
"Engine Oil and Oil Filter Replacement"
in Section 0B.
"Oil Pressure Check" in Section 6A1.
"Oil Pressure Check" in Section 6A1.
"Table B-7 Radiator Fan Control Sys-
tem Check" in this section.
"Diagnosis Table" in Section 5.
"Diagnosis Table" in Section 7C1.
"Valves and Cylinder Head Inspection"
in Section 6A1.
"High-Tension Cords Removal and
Installation" in Section 6F1.
"Spark Plugs Removal and Installation"
in Section 6F1.
"EGR valve inspection" Section 6E1.
"Improper engine idling or engine fails
to idle" in this table.
"Throttle position sensor (TP sensor)
on-vehicle inspection", "Engine coolant
temperature sensor (ECT sensor)
inspection" or "Mass air flow (MAF) and
intake air temperature (IAT) sensor
inspection" in Section 6E1.
"Table B-1 Fuel Injector Circuit Check"
in this section.
"Low compression" in this table.
"Valves and Cylinder Head Inspection"
in Section 6A1.
"Diagnosis Table" in Section 5.
"Diagnosis Table" in Section 7C1.
"Thermostat Inspection" in Section 6B.
"Wheel Maintenance" in Section 3F.
"Diagnostic Flow Table B-10" in this
section or "Oil control valve inspection"
in Section 6E1.