m54 engine - BMWClub.lv

OBD II - Misfire FaultsFAILEDCOMPONENTPOSSIBLE FAULT MISFIREEFFECT/LOCATIONFAILEDCOMPONENTPOSSIBLE FAULT MISFIREEFFECT/LOCATIONSpark plug electrode gap too small affected cylinderselectrodes missing affected cylinderselectrodes oil/fuel soaked affected cylinderselectrodes oil/feul soakedfouledspark plug ceramic broken affected cylindersoil level too high most likely more thanone cylinder affectedoil foamingoil level too high, oil/fuel fouledheat range too coldcrank case ventilation defective most likely more thanone cylinder affectedSpark plug connector wet, water or moisture most likely more thanone cylinder affectedbroken affected cylindersIgnition Coil internal defect, arcing affected cylindersConnectors ignition corrosion one or more cylinderspin backed out one or more cylindersplug loose one or more cylindersloose wire from connector one or more cylindersInjection Valve metal filing on the affectedcylindersleaking on the affectedcylinderscarbon fouled one or more cylindersdirty/contaminated one or more cylindersInjector connectors corrosion one or more cylinderspin backed out one or more cylindersplug loose one or more cylindersloose wire from connector one or more cylindersIntake manifold leaks intake plenum, unmetere airleak (i.e. injector seals)Intake/Exhaust valve carbon built up (intake) most likely more thanone cylinder affectedburnt or damaged on the affectedcylindersoverrev:intake or exhaust valves leaking (bent)most likely more thanone cylinder affectedCamshaft broken most likely more than onecylinder affectedPiston hole in piston crown/pistonseized in boreHydraulic lash adjusters(HVA)defective: i.e. oil borerestricted/blockedon the affected cylinderson the affected cylindersengine oil pressure built uptoo slowFuel pressure fuel pump, pressure too low most likely cyl. 1-3 (frontcylinders)fuel filter restricted/ blocked most likely cyl. 1-3 (frontcylinders)fuel pump, pressure build up too slow after startmost likely cyl. 1-3 (frontcylinders)leaking fuel feed lines most likely cyl. 1-3 (frontcylinders)pressure regulator defective most likely cyl. 1-3 (front(metal filing)cylinders)running loss valve defective most likely cyl. 1-3 (frontcylinders)fuel tank empty most likely cyl. 1-3 (frontcylinders)siphon jet pump and fuel most likely cyl. 1-3 (fronttank emptycylinders)water in fuel tank most likely more than onecylinder affectedFuel high content oxygenated one or more cylindersnon anti carbon additives one or more cylindersOxygen sensor excessive mixture deviation only the affected bankPurge sytem excessive rich mixture dueto high ambient temperatureCrank sensor/incrementwheelone or more banksblocked fuel tank vent inlet all cylindersincorrect input signal for all cylindersmisfire detectionincrement wheel loose all cylindersincrement wheel damaged affected segmentgap between sensor and affected segmentincrement wheelfly wheel damagedCatalyst damaged exhaust back pressure on only the afftected bankthe affected bankDME final stage igntion/injectors all cylinder31M54engMS43/ST039/3/17/00