5. FUEL INJECTION SYSTEM
MOVIE S 150i
TROUBLESHOOTING
Engine can't be started
· Intake air leak
· Fuel contaminated/deteriorated
· Faulty fuel pump
· Clogged fuel filter
· Pinched or clogged the fuel tube between the fuel tank and injector
· Clogged the injector
· Incorrect the fuel pressure
· Clogged IDLE AIR BYPASS VALVE
· Clogged the throttle body
· Faulty spark plug
Engine stall, hard to start, rough idling
· Intake air leak
· Faulty O ring installed between injector and intake manifold
· Faulty fuel pump
· Vacuum tube broken
· Faulty spark plug
· Clogged the injector
Engine running rough high speed
· Fuel reserved is too few
· Faulty fuel pump
· Clogged fuel filter
· Clogged the throttle body
· Clogged the air cleaner
· Incorrect timing of camshaft gear
Engine running poor during acceleration
· Clogged the air cleaner
· Incorrect the fuel pressure
· Clogged the muffler
· Faulty fuel pump or O ring damaged
· Clogged the injector
· Gasoline dirty
· Intake air leak
· Screw of O2 sensor damaged
· Clogged the injector
Computer crash
· Loosen the wire of ignition coil
· No use the R type spark plug
5-7
4.7 / 5