Engine Symptom Diagnosis - Suzuki Wagon R Plus RB310 Service Manual

Engine Symptom Diagnosis

Perform troubleshooting referring to following table when ECM has detected no DTC and no abnormality has
been found in visual inspection and engine basic inspection previously.
Condition
Hard Starting
(Engine cranks OK)
Possible Cause
Faulty spark plug
Leaky high-tension cord
Loose connection or disconnection of high-
tension cords or lead wires
Faulty ignition coil
Dirty or clogged fuel hose or pipe
Malfunctioning fuel pump
Air inhaling from intake manifold gasket or
throttle body gasket
Faulty idle air control system
Faulty ECT sensor or MAF sensor
Faulty ECM
Low compression
Poor spark plug tightening or faulty gasket
Compression leak from valve seat
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Malfunctioning PCV valve
VVT system out of order
ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-23
"Spark Plugs Inspection" in Section
6F2.
"High-tension Cords Inspection" in Sec-
tion 6F2.
"High-tension Cords Inspection" in Sec-
tion 6F2.
"Ignition Coil Assembly (Including Igni-
tor) Inspection" in Section 6F2.
"Table B-3 Fuel Pressure Check" in this
section.
"Table B-3 Fuel Pressure Check" in this
section.
"Table B-4 Idle Air Control System
Check" in this section.
"ECT Sensor Inspection" or "Mass Air
Flow (MAF) and Intake Air Temperature
(IAT) Sensor Inspection" in Section
6E2.
"Compression Check" in Section 6A1.
"Spark Plugs Removal and Installation"
in Section 6F2.
"Valves and Cylinder Head Inspection"
in Section 6A2.
"Valves and Cylinder Head Inspection"
in Section 6A2.
"Valves and Cylinder Head Inspection"
in Section 6A2.
"Valves and Cylinder Head Inspection"
in Section 6A2.
"Pistons, Piston rings, Connecting
Rods and Cylinders Inspection" in Sec-
tion 6A2.
"Pistons, Piston rings, Connecting
Rods and Cylinders Inspection" in Sec-
tion 6A2.
"PCV System Inspection" in Section
6E2.
"Oil Control Valve Inspection" in Section
6E2.
Reference Item