Suzuki Liana RH418 Supplementary Service Manual page 43

Condition
Poor gasoline mileage
Excessive engine oil
consumption – Oil
leakage
Possible cause
Leaks or loose connection of high-
tension cord
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.)
Faulty ignition coil with ignitor
Fuel pressure out of specification
Leaky manifold, throttle body, or cylinder
head gasket
Faulty idle air control system
Faulty evaporative emission control
system
Faulty fuel injector(s)
Poor performance of ECT sensor, TP
sensor or MAP sensor
Faulty ECM
Loose connection or disconnection of
vacuum hoses
Malfunctioning PCV valve
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
Low compression
Faulty fuel injector(s)
Poor valve seating
Improper tire pressure
Camshaft position control system out of
order
Blown cylinder head gasket
Leaky camshaft oil seals
Engine General Information and Diagnosis:
Correction / Reference Item
"High-Tension Cord Inspection in Section 1H in
related manual"
"Spark Plug Inspection in Section 1H in related
manual"
"Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual"
"Fuel Pressure Check"
"Idle Air Control System Check"
"EVAP Canister Purge Valve Inspection in
Section 1B in related manual"
"Fuel Injector Inspection in Section 1G"
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C in related manual",
"Throttle Position (TP) Sensor On-Vehicle
Inspection in Section 1C in related manual" or
"Manifold Absolute Pressure (MAP) Sensor
Inspection in Section 1C in related manual"
"PCV Valve Inspection in Section 1B in related
manual"
"Thermostat Inspection in Section 1F in related
manual"
"Water Pump Inspection in Section 1F in
related manual"
"Radiator On-Vehicle Inspection and Cleaning
in Section 1F in related manual"
"Engine Oil and Filter Change in Section 0B in
related manual"
"Engine Oil and Filter Change in Section 0B in
related manual" or "Oil Pan and Oil Pump
Strainer Cleaning in Section 1E in related
manual"
"Oil Pressure Check in Section 1E in related
manual"
"Radiator Fan Control System Check"
Condition "Dragging brakes" in "Brakes
Symptom Diagnosis in Section 4A in related
manual".
Condition "Slipping clutch" in "Clutch System
Symptom Diagnosis in Section 5C in related
manual".
Replace.
"Compression Check in Section 1D"
"Fuel Injector Inspection in Section 1G"
"Valves and Valve Guides Inspection in
Section 1D"
Adjust.
"Oil Control Valve Inspection in Section 1C"
Replace.
Replace.
1A-30