4-5
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TROUBLESHOOTING
7. Pressure regulator inspection
Check the fuel pressure and record it (page 5-111).
Disconnect the pressure regulator vacuum tube.
Check the fuel pressure.
Is the fuel pressure higher with the vacuum tube disconnected?
YES
–
GO TO STEP 8.
NO
–
Faulty pressure regulator.
8. Fuel injector inspection
Inspect the fuel injector (page 5-116).
Is the fuel injector normal?
YES
–
GO TO STEP 9.
NO
–
• Repair the open or short circuit fuel injector wire
• Faulty fuel injector
9. IAC valve inspection
Replace the IAC valve with a new one and start the engine.
Engine stalls?
YES
–
Replace the ECM with a new one and recheck.
NO –
Faulty original IAC valve.
ENGINE SOMETIMES MISFIRES OR TENDS TO STALL
1. Spark Test
Perform spark test (page 8-4) at all plugs.
Is there weak or no spark?
YES
–
Perform ignition system troubleshooting (page 8-3).
NO
–
GO TO STEP 2.
2. Spark Plug Inspection
Remove and inspect the spark plugs.
Are the spark plugs wet?
YES
–
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Blockage between the cooling fan cover and cylinder head
• Improper vapor separator float height
NO
–
GO TO STEP 3.
3. Fuel Flow Inspection
Inspect the fuel flow (page 5-113).
Is the fuel flow within specification?
YES
–
GO TO STEP 4.
NO
–
• Clogged fuel strainer (Low pressure side) (page 3-27)
• Clogged water separator (page 5-93)
• Clogged or damaged fuel tube
• Faulty fuel pump (Low pressure side)
• Clogged vapor separator air vent tube or filter
• Clogged fuel feed hose
• Clogged fuel strainer (High pressure side) (page 5-106)
• Faulty vapor separator (page 5-115)
• Faulty fuel pump (high pressure side)
Содержание BFT 250A
Страница 11: ...1 1 1 dummytext 1 GENERAL INFORMATION SERIAL NUMBER LOCATION 1 2 SPECIFICATIONS 1 2 DIMENSIONAL DRAWING 1 4...
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Страница 252: ...6 2 dummyhead dummyhead ENGINE COVER COVER LOCK ENGINE COVER COVER LOCK COMPONENT LOCATION 10 N m 1 0 kgf m 7 lbf ft...
Страница 308: ...10 2 dummyhead dummyhead OTHER ELECTRICAL OTHER ELECTRICAL SYSTEM LOCATION POWER TILT RELAY FUSE RELAY JUNCTION BOX...
Страница 322: ...MEMO dummyhead dummyhead...
Страница 324: ...11 2 dummyhead dummyhead COOLING SYSTEM COOLING SYSTEM COMPONENT LOCATION 20 N m 2 0 kgf m 15 lbf ft...
Страница 325: ...11 3 dummyhead dummyhead COOLING SYSTEM TOOLS LIST Attachment 42 x 47 mm 07746 0010300 Driver 07749 0010000...
Страница 342: ...MEMO dummyhead dummyhead...
Страница 344: ...12 2 dummyhead dummyhead LUBRICATION SYSTEM LUBRICATION SYSTEM COMPONENT LOCATION 10 N m 1 0 kgf m 7 lbf ft...
Страница 359: ...13 3 dummyhead dummyhead ENGINE REMOVAL INSTALLATION TOOL LIST Engine hanger VSB02C000021...
Страница 371: ...14 3 dummyhead dummyhead CYLINDER HEAD 39 2 N m 4 0 kgf m 29 lbf ft 50 53...
Страница 373: ...14 5 dummyhead dummyhead CYLINDER HEAD Air supply attachment 07VAJ P8A010A...
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Страница 554: ...18 2 dummyhead dummyhead MOUNT MOUNT COMPONENT LOCATION 83 N m 8 5 kgf m 61 lbf ft...
Страница 564: ...19 2 dummyhead dummyhead TRIM TILT TRIM TILT COMPONENT LOCATION 34 N m 3 5 kgf m 25 lbf ft 34 N m 3 5 kgf m 25 lbf ft...
Страница 606: ...MEMO dummyhead dummyhead...
Страница 608: ...20 2 dummyhead dummyhead CONTROLS CONTROLS COMPONENT LOCATION...
Страница 621: ...21 1 21 dummytext 21 TECHNICAL FEATURES SHIFT EFFORT REDUCTION SYSTEM 21 2 CHARGE OUTPUT ENHANCEMENT WHEN IDLING 21 4...
Страница 628: ...22 4 dummyhead dummyhead WIRING DIAGRAMS...