Suzuki WagonR+ RB310 Service Manual page 598

Condition
Surge
Leaky or loosely connected high-tension cord "High-tension Cords Inspection" in Sec-
(Engine power vari-
ation under steady
Faulty spark plug (excess carbon deposits,
throttle or cruise.
improper gap, and burned electrodes, etc.)
Feels like vehicle
Variable fuel pressure
speeds up and
down with no
Kinky or damaged fuel hose and lines
change in accelera-
Faulty fuel pump (clogged fuel filter)
tor pedal.)
Malfunctioning EGR valve
Poor performance of MAF sensor
Faulty fuel injector
Faulty ECM
Excessive detona- Faulty spark plug
tion
(Engine makes con-
Loose connection of high-tension cord
tinuously sharp
metallic knocks that
Engine overheating
change with throttle
Clogged fuel filter (faulty fuel pump) or fuel
opening. Sounds
lines
like pop corn pop-
ping.)
Air inhaling from intake manifold or throttle
body O-ring
Malfunctioning EGR valve
Poor performance of knock sensor, ECT sen-
sor or MAF sensor
Faulty fuel injector(s)
Faulty ECM
Excessive combustion chamber deposits
VVT system out of order
ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-27
Possible Cause Reference Item
tion 6F2.
"Spark Plugs Inspection" in Section
6F2.
"Table B-3 Fuel Pressure Check" in this
section.
"EGR Valve Inspection" in Section 6E2.
"Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Sensor Inspection"
in Section 6E2.
"Table B-1 Fuel Injector Circuit" in this
section.
"Spark Plugs Inspection" in Section
6F2.
"High-tension Cords Removal and
Installation" in Section 6F2.
"Overheating" in this table.
"Table B-1 Fuel Injector Circuit Check"
or "Table B-2 Fuel Pump and Its Circuit
Check" in this section.
"EGR Valve Inspection" in Section 6E2.
"DTC P0327 Knock Sensor Circuit Low"
or "DTC P0328 Knock Sensor Circuit
High" in this section, "ECT Sensor
Inspection" or "Mass Air Flow (MAF)
and Intake Air Temperature (IAT) Sen-
sor Inspection" in Section 6E2.
"Table B-1 Fuel Injector Circuit Check"
in this section.
"Pistons, Piston rings, Connecting
Rods and Cylinders Inspection" in Sec-
tion 6A2.
"Oil Control Valve Inspection" in Section
6E2.