2000 SUZUKI SWIFT fuel filter

6-28 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Poor gasoline mile-
age Leaks or loose connection of high-tension
cordHigh-tension cords in Section 6F1.
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.)Spark plugs in Section 6F1.
Malfunctioning EGR valve (if equipped) EGR system in Section 6E1.
High idle speed Refer to item “Improper engine idle
speed” previously outlined.
Poor performance of TP sensor, ECT sensor
or MAP sensorTP sensor, ECT sensor or MAP sensor
in Section 6E1.
Faulty EGR valve (if equipped) EGR system in Section 6E1.
Faulty fuel injector(s) Diagnostic Flow Table B-1.
Faulty ECM
Poor valve seating Valves inspection in Section 6A1.
Dragging brakes Trouble diagnosis in Section 5.
Slipping clutch Trouble diagnosis in Section 7C.
Thermostat out of order Thermostat in Section 6B.
Improper tire pressure Refer to Section 3F.
Low Compression Previously outlined
Excessive engine
oil consumption Blown cylinder head gasket Cylinder head in Section 6A1.
Leaky camshaft oil seals Camshaft in Section 6A1.
Sticky piston ring Piston cleaning in Section 6A1.
Worn piston and cylinder Pistons and cylinders inspection in Sec-
tion 6A1.
Worn piston ring groove and ring Pistons inspection in Section 6A1.
Improper location of piston ring gap Pistons assembly in Section 6A1.
Worn or damaged valve stem seal Valves removal and installation in Sec-
tion 6A1.
Worn valve stem Valves inspection in Section 6A1.
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-
mentSpark plugs in Section 6F1.
Leaky high-tension cord High-tension cords in Section 6F1.
Fuel pressure out of specification Diagnostic Flow Table B-3.
Malfunctioning EGR valve (if equipped) EGR system in section 6E1.
Poor performance of TP sensor, ECT sensor
or MAP sensorTP sensor, ECT sensor or MAP sensor
in Section 6E1.
Faulty fuel injector Diagnostic Flow Table B-1.
Faulty ECM
Engine overheating Refer to “Overheating” section.
Low compression Previously outlined.
Surge
(Engine power vari-
ation under steady
throttle or cruise.
Feels like vehicle
speeds up and
down with no
change in accelera-
tor pedal.)Leaky or loosely connected high-tension cord High-tension cords in Section 6F1.
Faulty spark plug (excess carbon deposits,
improper gap, and burned electrodes, etc.)Spark plugs in Section 6F1.
Variable fuel pressure Diagnostic Flow Table B-3.
Kinky or damaged fuel hose and lines
Faulty fuel pump (clogged fuel filter)
Malfunctioning EGR valve EGR system in Section 6E1.
Poor performance of MAP sensor MAP sensor in Section 6E1.
Faulty fuel injector Diagnostic Flow Table B-1.
Faulty ECM Condition Possible Cause Correction

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-29
Excessive detona-
tion
(Engine makes con-
tinuously sharp
metallic knocks that
change with throttle
opening. Sounds
like pop corn pop-
ping.)Faulty spark plug Spark plugs in Section 6F1.
Loose connection of high-tension cord High-tension cords in Section 6F1.
Engine overheating Refer to “Overheating” section.
Clogged fuel filter (faulty fuel pump) or fuel
linesDiagnostic Flow Table B-1 or B-2.
Air inhaling from intake manifold or throttle
body gasket
Malfunctioning EGR valve (if equipped) EGR system in Section 6E1.
Poor performance of knock sensor, ECT sen-
sor or MAP sensorKnock sensor in Section 6, ECT sensor
or MAP sensor in Section 6E1.
Faulty fuel injector(s) Diagnostic Flow Table B-1.
Faulty ECM
Excessive combustion chamber deposits Piston and cylinder head cleaning in
Section 6A1.
Engine has no
powerFaulty spark plug Spark plugs in Section 6F1.
Faulty ignition coil with ignitor Ignition coil in Section 6F1.
Leaks, loose connection or disconnection of
high-tension cordHigh-tension cords in Section 6F1.
Faulty knock sensor Knock sensor malfunction in this sec-
tion.
Clogged fuel hose or pipe Diagnostic Flow Table B-3.
Malfunctioning fuel pump Diagnostic Flow Table B-2.
Air inhaling from intake manifold gasket or
throttle body gasket
Engine overheating Refer to “Overheating” section.
Engine has no
powerMalfunctioning EGR valve (if equipped) EGR system inspection in Section 6E1.
Maladjusted accelerator cable play Accelerator cable play in Section 6E1.
Poor performance of TP sensor, ECT sensor
or MAP sensorTP sensor, ECT sensor or MAP sensor
in Section 6E1.
Faulty fuel injector(s) Diagnostic Flow Table B-1.
Faulty ECM
Dragging brakes Trouble diagnosis in Section 5.
Slipping clutch Trouble diagnosis in Section 7C.
Low compression Previously outlined. Condition Possible Cause Correction

6-120 ENGINE GENERAL INFORMATION AND DIAGNOSIS
TABLE B-3 FUEL PRESSURE CHECK
WIRING DIAGRAM
INSPECTION
1. Injector (A) : Fuel pressure gauge
2. Delivery pipe (B) : Hose
3. Fuel pump (C) : Attachment
Step Action Yes No
1 Check Fuel Pressure (Refer to Section 6E for
details).
1) Release fuel pressure from fuel feed line.
2) Install fuel pressure gauge.
3) Check fuel pressure by repeating ignition
switch ON and OFF. See Fig. 1.
Is fuel pressure then 270 – 310 kPa (2.7 – 3.1
kg/cm
2, 38.4 – 44.0 psi)?Go to Step 2. Go to Step 4.
2
Is 250 kPa (2.5 kg/cm
2, 35.6 psi) or higher fuel
pressure retained for 1 minute after fuel pump
is stopped at Step 1?Normal fuel pressure. Go to Step 3.
3 Is there fuel leakage from fuel feed line hose,
pipe or their joint?Fuel leakage from hose,
pipe or joint.Faulty fuel pressure regu-
lator.
4 Was fuel pressure higher than spec. in Step 1? Faulty fuel pressure regu-
lator.Clogged fuel filter,
Restricted fuel feed hose
or pipe, Faulty fuel pump
or Fuel leakage from hose
connection in fuel tank.

ENGINE FUEL 6C-1
6F1
6F2
6G
6C
6K
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 6C
ENGINE FUEL
CONTENTS
GENERAL DESCRIPTION .............................. 6C-1
ON-VEHICLE SERVICE .................................. 6C-2
COMPONENTS ........................................... 6C-2
PRECAUTIONS ........................................... 6C-3
FUEL LINES ................................................. 6C-4
FUEL PIPE ................................................... 6C-4
FUEL FILLER CAP ...................................... 6C-5FUEL TANK INLET VALVE ......................... 6C-6
FUEL TANK ................................................. 6C-7
FUEL PUMP ASSEMBLY .......................... 6C-10
DISASSEMBLY AND REASSEMBLY .... 6C-12
SPECIAL TOOL ............................................ 6C-14
TIGHTENING TORQUE SPECIFICATION.... 6C-14

GENERAL DESCRIPTION
The main components of the fuel system are fuel tank, fuel pump assembly (with fuel filter, fuel level gauge, fuel
pressure regulator and tank pressure control valve), fuel/vapor separator fuel feed line and fuel vapor line.
For the details of fuel flow and fuel vapor flow, refer to “GENERAL DESCRIPTION” in Section 6E. WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
CAUTION:
The engine of this vehicle requires the use of unleaded fuel only. Use of leaded and/or low lead fuel
can result in engine damage and reduce the effectiveness of the emission control system.

6C-2 ENGINE FUEL
ON-VEHICLE SERVICE
COMPONENTS
1. Fuel tank 7. Fuel vapor line 13. Fuel filler hose clamp screw 19. Fuel pressure regulator
2. Fuel pump assembly 8. EVAP canister 14. Tank cover 20. Fuel pump
3. Breather hose 9. Delivery pipe 15. Fuel filler bracket screw 21. Fuel filter assembly
4. Fuel filler cap 10. Fuel/vapor separator 16. Fuel filler bracket nut 22. Fuel level gauge (Fuel sender gauge)
5. Fuel feed line 11. Fuel pump bolt (6 pcs.) 17. Gasket Do not reuse.
6. Wire harness for fuel pump 12. Fuel tank bolt (4 pcs.) 18. O-ring Tightening torque

ENGINE FUEL 6C-11
3) Remove fuel pump assembly (1) from fuel tank (2).
INSPECTION
Check fuel pump assembly for damage.
Check fuel suction filter (1) for evidence of dirt and contami-
nation.
If present, replace or clean and check for presence of dirt in
fuel tank.
For operation or electrical circuit inspection by referring to
Section 6E1.
For inspection of fuel level gauge (2) by referring to Section
8.
Check tank pressure control valve referring to the following
procedures.
a) Air should pass through valve (2) smoothly from fuel vapor
line hose (3) “A” to “B” when blown hard.
b) Also, when vacuum pump (4) is connected to fuel vapor
hose and pump air through valve, air should pass from “B”
to “A”.
Special tool
(A) : 09917-47910
If air doesn’t pass through valve in Step a) or vacuum is main-
tained in Step b), replace fuel filter assembly (1).
1
2
WARNING:
Do not such air through fuel vapor line hose. Fuel vapor
inside valve is harmful.12

6C-12 ENGINE FUEL
DISASSEMBLY AND REASSEMBLY
Disassemble and reassemble fuel pump assembly, noting the fol-
lowings.
When removing fuel level sensor (3), press snap-fit part (4)
and slide it in the arrow direction as shown in figure.
When installing fuel level sensor to housing, fit fuel level sen-
sor securely.
“A” : Apply oil 5. O-ring 10. Fuel pressure regulator
1. Fuel filter assembly (including check valve) 6. Fuel level sensor (Fuel sender gauge) 11. Gasket
2. Grommet 7. Fuel pump 12. Fuel pump plate
3. Tube 8. Cushion Do not reuse.
4. Housing 9. Bracket
CAUTION:
While removing fuel level gauge, do not contact resis-
tor plate (1) or deform arm (2). It may cause fuel level
gauge to fail.
When removing grommet from fuel tube or bracket sub
assembly, be very careful not to cause damage to
grommet installed section (sealed section in bore).
Should it be damaged, replace it with new one, or fuel
will leak from that part.

ENGINE AND EMISSION CONTROL SYSTEM 6E1-5
AIR INTAKE SYSTEM
The main components of the air intake system are air cleaner (1), air cleaner outlet hose (2), throttle body (3),
idle air control valve (4) and intake manifold (5).
The air (by the amount corresponding to the throttle valve (6) opening and engine speed) is filtered by the air
cleaner (1), passes through the throttle body (3), is distributed by the intake manifold (5) and finally drawn into
each combustion chamber.
When the idle air control valve (4) is opened according to the signal from ECM, the air (7) bypasses the throttle
valve (6) through bypass passage and is finally drawn into the intake manifold (5).
1. Air Cleaner 16. Immobilizer indicator lamp (if equipped) 31. Monitor connector (vehicle without immobi-
lizer indicator lamp)
2. EVAP canister purge valve 17. Knock sensor (if equipped) 31-1. Diagnosis switch terminal (vehicle without
immobilizer indicator lamp)
3. IAT sensor 18. ECT sensor 31-2. Test switch terminal (vehicle without immobi-
lizer indicator lamp)
4. TP sensor 19. CMP sensor 31-3. Duty output terminal (vehicle without immobi-
lizer indicator lamp)
5. IAC valve 20. CKP sensor 32. Stop lamp
6. MAP sensor 21. VSS 33. Stop lamp switch
7. EGR valve (if equipped) 22. Radiation fan 34. ECM
8. EVAP canister 23. Malfunction indicator lamp in combination meter 35. Barometric pressure sensor (if equipped)
9. Tank pressure control valve (built-in fuel pump) 24. Park/Neutral position switch (A/T) 36. Battery
10. Fuel pump (with pressure regulator) 25. Ignition switch 37. CO adjusting resistor (if equipped)
11. Fuel level sensor (vehicle with immobilizer indi-
cator lamp)26. Starter magnetic switch 38. A/C compressor clutch (if equipped)
12. Ignition coil assembly 27. TCM 39. A/C switch (if equipped)
13. Fuel injector 28. Transmission range switch (A/T) 40. A/C evaporator temp. sensor (if equipped)
14. Heated Oxygen Sensor (HO2S)-1
(if equipped)29. DLC 41. Immobilizer control module (if equipped)
15. Heated Oxygen Sensor (HO2S)-2
(if equipped)30. Electric load 42. Main relay
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