Hyundai Santa Fe (2006 year). Manual — part 352

FL -18

FUEL SYSTEM

(SYMPTOM 3) POOR STARTING WHEN HOT

Possible Cause

• The compensation of individual injector not adapted
• Drift of the rail pressure sensor not detected
• Electric EGR control valve blocked open
• Fuel pressure regulator valve contaminated,

stuck, jammed

• Rail pressure regulator valve contaminated,

stuck, jammed

• Air filter sealed
• Air ingress in the low pressure fuel circuit
• Fuel quality / presence of water

• Fuel return circuit of the pump sealed
• Sealed fuel filter
• Engine compression too low
• Intermittent fault connection
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Gasoline in fuel
• Bug software or hardware fault not detected

(SYMPTOM 4) UNSTABLE IDLING

Possible Cause

• Fuel return hose of injector cut
• The compensation of individual injector not adapted
• Drift of the rail pressure sensor not detected
• Harness resistance increased
• Air ingress in the low pressure fuel circuit
• Fuel quality / presence of water
• Sealed fuel filter
• Air filter sealed
• Fuel return hose of injector sealed
• High pressure leakage

• Glow system faulty
• Engine compression too low
• Bad flanging of the injector
• High pressure pump out of order
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Injector jammed open
• Electric EGR control valve blocked open

(SYMPTOM 5) IDLE SPEED TOO HIGH OR TOO LOW

Possible Cause

• Drift of the engine coolant temperature

sensor not detected

• Incorrect state of the electrical pack devices
• Alternator or voltage regulator faulty

• Clutch not well set
• Bug software or hardware fault not detected
• Electric EGR control valve blocked open
• Throttle control actuator faulty

(SYMPTOM 6) BLUE, WHITE, OR BLACK SMOKES

Possible Cause

• The compensation of individual injector not adapted
• Drift of the engine coolant temperature

sensor not detected

• Drift of the rail pressure sensor not detected
• Electric EGR control valve blocked open
• Fuel pressure regulator valve contaminated,

stuck, jammed

• Rail pressure regulator valve contaminated,

stuck, jammed

• Oil level too high/too low
• Fuel quality / presence of water

• Catalytic converter sealed or damaged
• Air filter sealed
• Oil suction (engine racing)
• Glow system faulty
• Engine compression too low
• Bad flanging of the injector
• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Injector jammed open
• Gasoline in fuel

GENERAL

FL -19

(SYMPTOM 7) ENGINE RATTLING, NOISY ENGINE

Possible Cause

• The compensation of individual injector not adapted
• Electric EGR control valve blocked closed

(noisy engine)

• Electric EGR control valve blocked open
• Drift of the engine coolant temperature

sensor not detected

• Glow system faulty
• Engine compression too low
• Fuel return hose of injector sealed

• Drift of the rail pressure sensor not detected
• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Injector jammed open
• Drift of engine coolant temperature sensor

not detected

(SYMPTOM 8) BURST NOISE

Possible Cause

• The compensation of individual injector not adapted
• Intermittent fault connection
• Exhaust system sealed
• Drift of the rail pressure sensor not detected

• Fuel pressure regulator valve contaminated,

stuck, jammed

• Rail pressure regulator valve contaminated,

stuck, jammed

• Bug software or hardware fault not detected

(SYMPTOM 9) UNTIMELY ACCELERATION/DECELERATION AND ENGINE RACING

Possible Cause

• Accelerator position sensor blocked
• Electric EGR valve blocked open
• Intermittent fault connection

• Oil suction (engine racing)
• Drift of the rail pressure sensor not detected
• Bug software or hardware fault not detected

(SYMPTOM 10) GAP WHEN ACCELERATING AND AT RE-COUPLING (RESPONSE TIME)

Possible Cause

• Air inlet circuit open
• Incorrect state of the electrical pack devices
• Accelerator position sensor blocked
• Electric EGR valve blocked open
• Turbo charger damaged, vacuum hose line leakage
• Sealed fuel filter

• Engine compression too low
• High pressure leakage
• Fuel pressure regulator valve contaminated,

stuck, jammed

• Rail pressure regulator valve contaminated,

stuck, jammed

• Needle stuck (injection possible over a

certain pressure)

• Bug software or hardware fault not detected

FL -20

FUEL SYSTEM

(SYMPTOM 11) ENGINE STOP OR STALLING

Possible Cause

• Run out of fuel
• Fuel pump hose supply cut
• High pressure leakage
• Fuse faulty
• Fuel quality / presence of water
• Low pressure fuel circuit sealed
• Sealed fuel filter
• Crank signals missing simultaneously
• Electric EGR valve blocked open
• Fuel pressure regulator valve contaminated,

stuck, jammed

• Rail pressure regulator valve contaminated,

stuck, jammed

• Alternator or voltage regulator faulty
• Intermittent fault connection
• Catalytic converter sealed or damaged
• Low pressure fuel pump faulty
• High pressure pump faulty
• Gasoline in fuel
• Bug software or hardware fault not detected

(SYMPTOM 12) ENGINE JUDDER

Possible Cause

• Run out of fuel
• Fuel return hose of injector cut
• Incorrect state of the electrical pack devices
• The compensation of individual injector not adapted
• Electric EGR valve blocked open
• Fuel filter not adapted
• Air ingress in the low pressure fuel circuit
• Fuel quality / presence of water
• Sealed fuel filter
• Intermittent fault connection
• Harness resistance increased

• Glow system faulty
• Engine compression too low
• Fuel return hose of injector sealed
• Valve clearance
• Low pressure fuel pump faulty
• Injector washer not adapted, forgotten, doubled
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Injector jammed open
• Gasoline in fuel
• Bug software or hardware fault not detected

(SYMPTOM 13) LACK OF POWER

Possible Cause

• The compensation of individual injector not adapted
• Accelerator position sensor blocked
• Incorrect state of the electrical pack devices
• Electric EGR valve blocked open
• Air inlet circuit open
• Air filter sealed
• Oil level too high/too low
• Catalytic converter sealed or damaged
• Turbo charger damaged, vacuum hose line leakage

• Sealed fuel filter
• Leakage at the injector
• Fuel return circuit of the pump sealed
• Fuel return hose of injector sealed
• Engine compression too low
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Valve clearance
• Throttle control actuator faulty
• Engine coolant temperature too high
• Fuel temperature too high

(SYMPTOM 14) TOO MUCH POWER

Possible Cause

• The compensation of individual injector not adapted
• Oil suction (engine racing)

• Bug software or hardware fault not detected

GENERAL

FL -21

(SYMPTOM 15) EXCESSIVE FUEL CONSUMPTION

Possible Cause

• Fuel return hose of injector cut
• Leakage at the Fuel pressure regulator valve
• Leakage at fuel temperature sensor
• Leakage at the spacers
• High pressure leakage
• Air inlet circuit open
• Air filter sealed
• The compensation of individual injector not adapted
• Electric EGR valve blocked open

• Incorrect state of the electrical pack devices
• Oil level too high/too low
• Fuel quality / presence of water
• Catalytic converter sealed or damaged
• Turbo charger damaged
• Engine compression too low
• Injector not adapted
• Bug software or hardware fault not detected

(SYMPTOM 16) OVER SPEED ENGINE WHEN CHANGING THE GEAR BOX RATIO

Possible Cause

• Accelerator position sensor blocked
• The compensation of individual injector not adapted
• Intermittent fault connection
• Clutch not well set

• Oil suction (engine racing)
• Turbo charger damaged
• Injector not adapted
• Bug software or hardware fault not detected

(SYMPTOM 17) EXHAUST SMELLS

Possible Cause

• Electric EGR control valve leakage
• Oil suction (engine racing)
• Turbo charger damaged
• Oil level too high/too low
• The compensation of individual injector not adapted
• Catalytic converter sealed or damaged
• Bad flanging of the injector

• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Injector jammed open
• Bug software or hardware fault not detected

(SYMPTOM 18) SMOKES (BLACK, WHITE, BLUE) WHEN ACCELERATING

Possible Cause

• The compensation of individual injector not adapted
• Electric EGR valve blocked open
• Air filter sealed
• Fuel quality / presence of water
• Oil level too high/too low
• Turbo charger damaged
• Catalytic converter sealed or damaged
• Oil suction (engine racing)
• Air heaters out of order
• Engine compression too low
• High pressure leakage

• Intermittent fault connection
• Bad flanging of the injector
• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a

certain pressure)

• Injector jammed open
• Gasoline in fuel
• Bug software or hardware fault not detected
• Catalyzed Particulate Filter (CPF) fail