Suzuki Wagon R Plus RB310, Service Manual

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6-2-26 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
Excessive engine
oil consumption Blown cylinder head gasket “Valves and Cylinder Head Inspection”
in Section 6A2.
Leaky camshaft oil seals “Camshaft, Tappet and Shim” in Sec-
tion 6A2.
Sticky piston ring “Pistons, Piston rings, Connecting
Rods and Cylinders Inspection” in Sec-
tion 6A2.
Worn piston and cylinder “Pistons, Piston rings, Connecting
Rods and Cylinders Inspection” in Sec-
tion 6A2.
Worn piston ring groove and ring “Pistons, Piston rings, Connecting
Rods and Cylinders Inspection” in Sec-
tion 6A2.
Improper location of piston ring gap “Pistons, Piston rings, Connecting
Rods and Cylinders Disassembly and
Assembly” in Section 6A2.
Worn or damaged valve stem seal “Valves and Cylinder Head Disassem-
bly and Assembly in Section 6A2.
Worn valve stem “Valves and Cylinder Head Inspection”
in Section 6A2.
Engine hesitates
(Momentary lack of
response as accel-
erator is depressed.
Can occur at all
vehicle speeds.
Usually most severe
when first trying to
make vehicle move,
as from a stop sign.) Spark plug faulty or plug gap out of adjust-
ment “Spark Plugs Inspection” in Section
6F2.
Leaky high-tension cord “High-tension Cords Inspection” in Sec-
tion 6F2.
Fuel pressure out of specification “Table B-3 Fuel Pressure Check” in this
section.
Malfunctioning EGR valve “EGR Valve Inspection” in Section 6E2.
Poor performance of TP sensor, ECT sensor
or MAF sensor “TP Sensor On-Vehicle Inspection”,
“ECT Sensor Inspection” or “Mass Air
Flow (MAF) and Intake Air Temperature
(IAT) Sensor Inspection” in Section
6E2.
Faulty fuel injector “Table B-1 Fuel Injector Circuit Check”
in this section.
Faulty ECM
Engine overheating
“Overheating” in this table.
Low compression “Low Compression” in this table.
VVT system out of order “Oil Control Valve Inspection” in Section
6E2.
Condition Possible Cause Reference Item