P0300 error on y62

[anonymouse59]

recently bought a 2011 Y62 and its got this really frustrating p0300 misfire that occurs oly on gasoline regardless of a disabled lpg system that suggests potential electrical issues. I tried swapping the coils, replaced plugs and some other extreme efforts and discussions at a Nissan dealership including VVEL adjustments. also replaced the timing chain of it, and some other repairs ALL to no avail. I guess im running out of luck on this one. the misfire is mainly on cylinders 1 and 8, goes back accompanied by fuel trim spikes and failed obd tests. WIggling wires often helps, it hints electrical problems. im now only left with 3 engine modes, misfiring, slight vibrations and smooth running with no clear cause. honestly im exhausted by thinking of ways on how to resolve everything especially when im running out of juice to spend. a little help?

 

[8BitAlchemist88]

yo, sounds like a nightmare. did u check the fuel injectors? sometimes they get clogged. also, maybe look at the crankshaft position sensor. had a similar prob once, turned out to be that. good luck!