Suzuki Wagon R Manual page 367

6-28 ENGINE DIAGNOSIS
Condition
Improper engine
idling or engine
fails to idle
Possible Cause
Ignition system out of order
D Faulty spark plug
D Leaky or disconnected high-tension cord
D Faulty ignition coil with ignitor
Fuel system out of order
D Fuel pressure out of specification
D Leaky manifold, throttle body, or cylinder head
gasket
Engine and emission control system out of
order
D Malfunctioning EGR valve (if equipped)
D Faulty idle air control system
D Faulty evaporative emission control system
D Faulty EGR system (if equipped)
D Faulty fuel injector(s)
D Poor performance of ECT sensor, TP sensor or
MAP sensor
D Faulty ECM
Engine overheating
Low compression
Others
D Loose connection or disconnection of vacuum
hoses
D Malfunctioning PCV valve
Referring Item
Spark plugs in Section 6F1
High-tension cords in Section 6F1
Ignition coil in Section 6F1
Diagnostic Flow Table B-3 in
Section 6
EGR system in Section 6E
Diagnostic Flow Table B-4
EVAP control system in Section
6E
EGR system in Section 6E
Diagnostic Flow Table B-1
ECT sensor, TP sensor or MAP
sensor in Section 6E
Refer to "Overheating" section
Previously outlined
PCV system in Section 6E