Suzuki Swift User Manual page 76

Condition
Engine hesitates Ignition system out of order
D Spark plug faulty or plug gap out of adjustment
(Momentary lack of
D Leaky high-tension cord
response as
accelerator is Fuel system out of order
D Fuel pressure out of specification
depressed.
Can occur at all Engine and emission control system out of
vehicle speeds. order
D Poor performance of TP sensor, ECT sensor or
Usually most severe
when first trying to
D Faulty fuel injector
make vehicle move,
D Faulty ECM (PCM)
as from a stop sign.)
Engine overheating
Low compression
Surge Ignition system out of order
D Leaky or loosely connected high-tension cord
(Engine power
D Faulty spark plug (excess carbon deposits,
variation under
steady throttle or
cruise. Fuel system out of order
D Variable fuel pressure
Feels like vehicle
D Kinky or damaged fuel hose and lines
speeds up and down
D Faulty fuel pump (clogged fuel filter)
with no change in
accelerator pedal.) Engine and emission control system out of
order
D Poor performance of MAP sensor
D Faulty fuel injector
D Faulty ECM (PCM)
Excessive Engine overheating
detonation Ignition system out of order
D Faulty spark plug
(Engine makes
D Loose connection of high-tension cord
continuously
sharp metallic Fuel system out of order
D Clogged fuel filter (faulty fuel pump) or fuel lines
knocks that change
D Air inhaling from intake manifold or throttle body
with throttle opening.
Sounds like pop corn
popping.) Engine and emission control system out of
order
D Poor performance of ECT sensor or MAP sensor
D Faulty fuel injector
D Faulty ECM (PCM)
D Excessive combustion chamber deposits
Possible Cause
MAP sensor
improper gap, and burned electrodes, etc.)
gasket
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-25
Referring Item
Spark plugs in Section 6F
High-tension cords in Section 6F
Diagnostic Flow Table B-3
Trouble diagnosis in Section 6
TP sensor, ECT sensor or MAP
sensor in Section 6E1
Diagnostic Flow Table B-1
Refer to "Overheating" section
Previously outlined
High-tension cords in Section 6F
Spark plugs in Section 6F
Diagnostic Flow Table B-3
MAP sensor in Section 6E1
Diagnostic Flow Table B-1
Refer to "Overheating" section
Spark plugs in Section 6F
High-tension cords in Section 6F
Diagnostic Flow Table B-1 or B-2
Trouble diagnosis in Section 6
ECT sensor or MAP sensor in
Section 6E1
Diagnostic Flow Table B-1
Piston and cylinder head cleaning
in Section 6A