Suzuki RA410 Manual page 257

Condition
Excessive detona- Engine overheating
tion
(The engine makes Ignition system out of order
•
sharp metallic
•
knocks that change
with throttle open-
ing. Fuel system out of order
•
Sounds like pop
•
corn popping.)
Engine and emission control system
out of order
•
•
•
•
Others
•
•
•
Overheating
•
•
•
•
•
•
•
•
•
Poor gasoline Ignition system out of order
•
mileage
•
•
Engine and emission control system out
of order
•
•
•
•
•
Low compression
Others
•
•
•
•
•
Possible Cause
Faulty spark plug
Improper ignition timing
Clogged fuel filter and fuel lines
Air inhaling from intake mainfold or throttle
body gasket.
g
Faulty EGR system (if equipped)
Faulty ECT sensor or MAP sensor
Faulty injector
Faulty ECM/PCM
Excessive deposits in combustion chamber
Faulty knock sensor
Inoperative thermostat
Poor water pump performance
Clogged or leaky radiator
Improper engine oil grade
Clogged oil filter or oil strainer
Poor oil pump performance
Dragging brakes
Slipping clutch
Blown cylinder head gasket
Faulty radiator fan-control system
Faulty spark plug (improper gap, heavy
deposits, and burned electrodes, etc.)
Leaky or loosely connected high-tension
cord
Cracked rotor or cap in distributor
Fuel pressure out of specification
Faulty TP sensor, ECT sensor or MAP
sensor
Faulty EGR system (if equipped)
Faulty injector
Faulty ECM/PCM
Poor valve seating
Dragging brakes
Slipping clutch
Thermostat out of order
Improper tire pressure
Refer to Overheating condition in this table.
Spark plugs in SECTION 6F1.
Ignition timing in SECTION 6F1.
Fuel pressure check in SECTION 6E1.
y
Diag. Flow Table B-5 in SECTION 6E1.
ECT sensor or MAP sensor in SECTION
6E1.
Fuel injector in SECTION 6E1.
Inspection of ECM/PCM and its circuit in
SECTION 6E1.
Piston and cylinder head cleaning
in SECTION 6A4.
Knock sensor in SECTION 6E1.
Thermostat in SECTION 6B.
Water pump in SECTION 6B.
Radiator in SECTION 6B.
Engine oil and oil filter change in
SECTION 0B.
Oil pressure check in SECTION 6A4.
Oil pressure check in SECTION 6A4.
Diagnosis in SECTION 5.
Diagnosis in SECTION 7C.
Cylinder head inspection in SECTION 6A4.
Diag. Flow Table B-7 in SECTION 6E1.
Spark plugs in SECTION 6F1.
High-tension cords in SECTION 6F1.
Distributor in SECTION 6F1.
Diag. Flow Table B-3 in SECTION 6E1.
TP sensor, ECT sensor or MAP sensor in
SECTION 6E1.
Diag. Flow Table B-5 in SECTION 6E1.
Fuel injector in SECTION 6E1.
Inspection of ECM/PCM and its circuit in
SECTION 6E1.
Previously outlined.
Valve inspection in SECTION 6A4.
Diagnosis in SECTION 5.
Diagnosis in SECTION 7C.
Thermostat in SECTION 6B.
ENGINE 6-13
Reference Item