Hyundai: Engine D4FA. Manual — part 38

GENERAL

FLA -23

Problem

Possible cause

EGR valve blocked open

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

Exhaust smells

Bug software or hardware fault not detected

The compensation of individual injector not adapted

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

Petrol in fuel

Smokes (black, white, blue)
when accelerating

Bug software or hardware fault not detected

Pump hose supply cut

Fuel return hose of nozzle holder cut

Leakage at the Fuel pressure regulator valve

Leakage at fuel temperature sensor

Leakage at the spacers

Fuel smells

High pressure leakage

FLA -24

FUEL SYSTEM

Problem

Possible cause

Accelerator position sensor blocked

Incorrect state of the electrical pack devices

Air filter sealed

Inversion of low pressure fuel connections

Fuel filter not adapted

Fuel quality/presence of water

Air ingress in the low pressure fuel circuit

Sealed fuel filter

Catalytic converter sealed or damaged

Clutch not well set

Intermittent fault connection

Drift of the rail pressure sensor not detected

Fuel pressure regulator valve contaminated, stuck, jammed

Rail pressure control valve contaminated, stuck, jammed

Petrol in fuel

The engine collapses at take off

Bug software or hardware fault not detected

Faulty ignition key

Oil suction (engine racing)

The engine does not stop

Bug software or hardware fault not detected

Buzzer noise (discharge by the injectors)

Clip broken (vibrations, resonance, noises)

Incorrect state of the electrical pack devices

Catalytic converter sealed or damaged

Air inlet circuit open

Bad flanging of the injector

Clutch not well set

Turbo charger damaged

Different mechanical noises

Valve clearance

GENERAL

FLA -25

SYMPTOM TROUBLESHOOTING GUIDE CHART (II)

Fuel pressure regulator valve /
Rail pressure control valve

LGJF500A

FLA -26

FUEL SYSTEM

LXGF502A