Content .. 53 54 55 56 ..

Snowmobile Arctic Cat (2004 year). Manual - part 55

4-55

EFI COMPONENT VOLTAGE/RESISTANCE CHART -

AIR TEMPERATURE

TEMP/C

TEMP/F

VOLTAGE

OHMS

100

212

0.113

555

208

0.121

595

205

0.128

635

201

0.136

675

198

0.143

715

194

0.151

755

190

0.162

819

187

0.173

883

183

0.184

947

180

0.195

1011

176

0.206

1075

172

0.222

1160

169

0.238

1245

165

0.253

1330

162

0.269

1415

158

0.285

1500

154

0.308

1640

151

0.331

1780

147

0.353

1920

144

0.376

2060

140

0.399

2200

136

0.432

2410

133

0.465

2620

129

0.498

2830

126

0.531

3040

122

0.564

3250

118

0.612

3595

115

0.659

3940

111

0.707

4285

108

0.754

4630

104

0.802

4975

100

0.869

5490

0.937

6005

1.004

6520

1.072

7035

1.139

7550

TEMP/C

TEMP/F

VOLTAGE

OHMS

1.230

8540

1.322

9530

1.413

10520

1.505

11510

1.596

12500

1.716

14020

1.836

15540

1.955

17060

2.075

18580

2.195

20100

2.323

23060

2.452

26020

2.580

28980

2.709

31940

2.837

34900

-2

2.969

39940

-4

3.101

44980

-6

3.233

50020

-8

3.365

55060

-10

3.497

60100

-12

3.610

76080

-14

3.722

92060

-16

3.835

108040

-18

-0.4

3.947

124020

-20

-4

4.060

140000

-22

-8

4.142

156000

-24

-11

4.224

172000

-26

-15

4.306

188000

-28

-18

4.388

204000

-30

-22

4.470

220000

-32

-26

4.522

261000

-34

-29

4.574

302000

-36

-32

4.625

343000

-38

-36

4.677

384000

-40

4.729

425000

4-56

EFI COMPONENT VOLTAGE/RESISTANCE CHART -

WATER TEMPERATURE

TEMP/C

TEMP/F

VOLTAGE

OHMS

110

230

0.115

129

108

226

0.129

137

106

223

0.143

145

104

219

0.157

153

102

216

0.171

161

100

212

0.185

169

208

0.192

180

205

0.199

191

201

0.206

202

198

0.213

213

194

0.220

224

190

0.235

240

187

0.250

256

183

0.265

273

180

0.280

289

176

0.295

305

172

0.317

327

169

0.339

349

165

0.361

371

162

0.383

393

158

0.405

415

154

0.438

445

151

0.471

475

147

0.504

505

144

0.537

535

140

0.570

565

136

0.598

609

133

0.626

653

129

0.654

697

126

0.682

741

122

0.710

785

118

0.759

849

115

0.808

913

111

0.857

977

108

0.906

1041

104

0.955

1105

100

1.023

1214

1.091

1323

1.159

1432

1.227

1541

1.295

1650

TEMP/C

TEMP/F

VOLTAGE

OHMS

1.377

1800

1.459

1950

1.541

2100

1.623

2250

1.705

2400

1.806

2670

1.907

2940

2.008

3210

2.109

3480

2.210

3750

2.327

4170

2.444

4590

2.561

5010

2.678

5430

2.795

5850

-2

2.901

6510

-4

3.007

7170

-6

3.113

7830

-8

3.219

8490

-10

3.325

9150

-12

3.421

9422

-14

3.517

9694

-16

3.613

9966

-18

-0.4

3.709

10238

-20

-4

3.805

10510

-22

-8

3.885

13688

-24

-11

3.965

16866

-26

-15

4.045

20044

-28

-18

4.125

23222

-30

-22

4.205

26400

-32

-26

4.267

30520

-34

-29

4.329

34640

-36

-32

4.391

38760

-38

-36

4.453

42880

-40

4.515

47000

-42

-44

4.553

55100

-44

-47

4.591

63200

-46

-51

4.629

71300

-48

-54

4.667

79400

-50

-58

4.705

87500

4-57

Troubleshooting Fuel

System

Fuel System

(Related Items)

Some components may vary from model to model.
The technician should use discretion and sound judg-
ment when removing and installing components.

Whenever any maintenance or inspection is made on
the fuel system in which fuel leakage may occur, there
should be no welding, smoking, or open flames in the
area.

NOTE: Some illustrations and photographs used

in this section are used for clarity purposes only
and are not designed to depict actual conditions.

Fuel System

(Related Items)

Table of Contents

Oil-Injection Pump................................................. 4-57
Synchronizing Oil-Injection Pump ......................... 4-58
Bleeding Oil-Injection System (Standard Models). 4-59
Bleeding Oil-Injection System (“Laydown” Engine

Models) .............................................................. 4-59

Testing Oil-Injection Pump .................................... 4-60
Testing Oil-Injection Check Valves ........................ 4-61
Fuel Pump (Carbureted Models)........................... 4-61
Air-Intake Silencer (One-Piece Style) ................... 4-63
Air-Intake Silencer (Cover/Tool Tray Style)............ 4-63
Air-Intake Silencer (“Laydown” Engine Style)........ 4-63
Gas Tank/Seat Assembly ...................................... 4-64

Oil-Injection Pump

REMOVING

NOTE: On “Laydown” engine models to service

t h e o i l - i n j e c t i o n p u m p , t h e e n g i n e m u s t b e
removed (see Section 2); then proceed to step 3.

1. Turn the gas tank shut-off valve to the CLOSED

position.

2. If applicable, remove the carburetors.

3. Disconnect the oil-supply hose from the pump and

plug to prevent oil drainage.

4. Remove the two oil-delivery hoses from the

adapter plates.

5. Disconnect the oil-injection cable/control rod.

6. Remove the two screws, lock washers, and

washers securing the oil-injection pump and
retainer to the crankcase.

Problem: Too Rich

Condition

Remedy

1. Diagnostic trouble code

2. Fuel pressure too high

3. Fuel return hose obstructed

4. Injectors leaking

1. Replace problem sensor

2. Replace regulator

3. Service — replace hose — remove obstruction

4. Replace injectors

Problem: Too Lean

Condition

Remedy

1. Diagnostic trouble code

2. Fuel pressure too low

3. Vent hose obstructed

4. Fuel filter(s) obstructed

1. Replace problem sensor

2. Replace regulator/fuel pump

3. Remove obstruction

4. Replace fuel filter(s)

4-58

AB078

7. Pull the oil-injection pump away from the engine

and account for a gasket.

8. Turn the pump sideways; then remove the lower

union bolt. Account for two gaskets. Remove the
pump.

9. Remove the remaining union bolts securing the

check valves to the pump. Account for two
gaskets.

10. Remove the check valves. Account for two

gaskets.

INSTALLING

1. In turn on each front union bolt, install a gasket,

check valve, and gasket; then install on the oil-
injection pump.

2. Place the gasket and oil-injection pump near the

engine; then install the lower union bolt through a
gasket, check valve, and gasket.

3. Position the oil-injection pump on the engine

making sure the oil-injection pump gear is
correctly aligned with the oil-injection pump drive
gear.

4. Secure the pump with two screws, lock washers,

and washers. Tighten screws to 0.7 kg-m (5 ft-lb).

5. Connect the two oil-delivery hoses to the adapter

plates. Secure with clamps.

6. Connect the oil-injection cable/control rod to the

pump and secure.

7. Connect the oil-supply hose to the oil-injection

pump inlet fitting. Secure with the clamp.

8. Bleed the oil-injection system (see Bleeding Oil-

Injection System in this sub-section).

9. Check the oil-injection system synchronization

(see Synchronizing Oil-Injection Pump in this sub-
section). Tighten the jam nuts securely.

NOTE: On “Laydown” engine models to install

the engine, see procedure in Section 2.

10. If applicable, install the carburetors.

11. Turn the shut-off valve to the OPEN position.

Synchronizing Oil-

Injection Pump

CHECKING

NOTE: On “Laydown” engine models to access

the oil pump, tip the snowmobile on its left side;
then using a torx-bit, remove the screws securing
the center belly pan (skid plate) to the front end.

1. With the ignition switch key in the OFF position,

move the throttle lever to the full-open position.

2. Check the alignment of the mark on the pump

housing and the mark on the control arm. If the
marks align, the oil-injection pump is
synchronized with the carburetors and no
adjustment is necessary. If the marks do not align,
adjust until alignment is attained.

727-185C

738-338A

ADJUSTING

1. Loosen the jam nuts securing the cable/control rod

adjuster.

Content .. 53 54 55 56 ..