Unstable Idling; Idle Speed Too High Or Too Low; Blue, White Or Black Smokes; Engine Rattling, Noisy Engine - Hyundai Seasall S250S Workshop Manual

Fuel System
• Injector needle stuck (injection possible over
a certain pressure)
(SYMPTOM 4) UNSTABLE IDLING
• Not connected fuel return line at injector
• Compensation of individual injector not adapted
• No rail pressure sensor signal
• Wiring harness open or poor connection
• Air ingress in the low pressure fuel circuit
• Bad fuel quality or water ingress in fuel
• Clogged fuel filter
• Clogged air filter
• Clogged injector return line
• Leakage in high pressure fuel circuit
(SYMPTOM 5) IDLE SPEED TOO HIGH OR TOO LOW
• No engine coolant temperature sensor signal
• Incorrect state of the electrical pack devices
(SYMPTOM 6) BLUE,WHITE OR BLACK SMOKES
• Compensation of individual injector not adapted
• No engine coolant temperature sensor signal
• No rail pressure sensor signal
• Fuel pressure regulator valve contaminated,
stuck, jammed
• Rail pressure regulator valve contaminated,
stuck, jammed
• Oil level too high or too low
• Bad fuel quality or water ingress in fuel
• Clogged air filter
(SYMPTOM 7) ENGINE RATTLING, NOISY ENGINE
• Compensation of individual injector not adapted
• No engine coolant temperature sensor signal
• Faulty glow system
• Low compression pressure
• Clogged injector return line
• No rail pressure sensor
• Poor injector washer, no washer or two washer
99
• Gasoline in fuel
• ECM program error or hardware
• Faulty glow system
• Low compression pressure
• Poor tightening of injector clamp
• Faulty high pressure fuel pump
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Injector needle stuck (injection possible over
a certain pressure)
• Injector jammed open
• Faulty alternator or voltage regulator
• ECM program error or hardware fault
• Oil suction (engine racing)
• Faulty glow system
• Low compression pressure
• Poor tightening of injector clamp
• Poor injector O-ring, no O-ring or two O-ring installed
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Injector jammed open
• Gasoline in
installed
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Injector needle stuck (injection possible over
a certain pressure)
• Injector jammed open
• No engine coolant temperature sensor
General Information