FUEL INJECTION (FUEL SYSTEMS)(H4DOTC) > Fuel System Trouble in General

INSPECTION

Trouble and possible cause

Corrective action

1. Insufficient fuel supply to injector

1)

Fuel pump does not operate.

 
 

Defective terminal contact

Inspect contact, especially ground, and tighten it securely.

 

Trouble in electromagnetic or electronic circuit parts

Replace the faulty parts.

2)

Decline of fuel pump function

Replace the fuel pump.

3)

Clogging of fuel filter

Replace the fuel filter.

4)

Clogged or bent fuel pipe or hose

Clean, correct or replace the fuel pipe or hose.

5)

Air is mixed in the fuel system.

Inspect or retighten each connection part.

6)

Clogged or bent air breather tube or pipe.

Clean, correct or replace the air breather tube or pipe.

7)

Damaged diaphragm of pressure regulator

Replace.

2. Leakage or blow out of fuel

1)

Loose joints of the fuel pipe

Retighten.

2)

Cracked fuel pipe, hose and fuel tank

Replace.

3)

Defective welding part on the fuel tank

Replace.

4)

Defective drain gasket of the fuel tank

Replace.

5)

Clogged or bent air breather tube or air vent tube

Clean, correct or replace the air breather tube or air vent tube.

3. Gasoline smell inside of compartment

1)

Loose joints at air breather tube, air vent tube and fuel filler pipe

Retighten.

2)

Problem in tightness of the fuel saucer gasket air

Correct or replace the gasket.

3)

Fuel pump trouble

Replace.

4. Defective fuel meter indicator

1)

Defective operation of fuel level sensor

Replace.

2)

Defective operation of fuel meter

Replace.

5. Noise

1)

Large operation noise or vibration of fuel pump

Replace.

NOTE:

When the vehicle is left unattended for an extended period of time, water may accumulate in the fuel tank. Fill fuel fully to prevent the problem.

In snow-covered areas, mountainous areas, skiing areas, etc. where ambient temperatures drop below 0°C (32°F) throughout the winter season, use a water removing agent in the fuel system to prevent freezing fuel system and accumulating water.

When water is accumulated in the fuel filter, add a water removing agent in the fuel tank.

Before using water removing agent, follow the cautions noted on the bottle.