Air filters are clogged Fuel line capacity is reduced Fuel is contaminated Fuel filters are clogged Clogged vent hole in the fuel tank cap Fuel injectors are dirty or faulty The high pressure fuel pump mechanism is not adjusted Non-recommended fuel Non-recommended oil Turbocharger is faulty High-pressure fuel pump is malfunctioning Reduced exhaust system capacity Engine is overheated or overcooled Engine is faulty Valve clearances are abnormal Leaks in the suction system or leaks in the exhaust system
Replace the filter elements. Repair or replace the fuel line. Drain the fuel from the tank and clean the fuel inlet strainer. Refill with fresh fuel. Replace filters. Clean the vent hole in the cover or install a new cover. Contact your authorized dealer. Contact your authorized dealer. Fill with the recommended fuel. Fill with the recommended oil. Contact your authorized dealer. Contact your authorized dealer. Remove the muffler and start the engine. See below. Contact your authorized dealer. Check and adjust valves. Contact your authorized dealer.