Hi Guys,
New on the forum so excuse me if im not in the right place
.
I have an e90 and an e46 with the m57 4 cylinder diesel engine.
My e46 (280k km) has a tune I bought it with, I do not know the details of it but you can notice it over the stock tune.
I had this car for a year without any issues after a year it started with this pinking noise (I guess knockin) on acceleration around 1500 to 3000 revs, basically when under load.
(I can best describe it as a chain being dragged on concrete).
I was thinking fuel system issue and because of the incorrect fueling Im getting bad burn and the poor valves are being raped and they are chiming.
I had the injectors rebuilt as first I was suspecting them being the problem.
However the noise did not go away. Maybe something else in the commonrail fuel system chain?
(no codes BTW)
Anyone have any experiance on idea on this ?
I would appriciate any help with this
Thank you.