hi guys,
it is one year that I try to solve a knock problem at low revs.
I rebuilt the engine 3 times because of a faulty set of rings, from that moment when the engine is hot starts to knock at low revs for a short time, but as soon as the boost starts to rise the noise disappears. I mounted a wideband to monitor afr:
idle 14:00
cruise 14.5
boost wot 12.5
I think it is correct?
I tried to retard the timing to 6 degrees but nothing.
I'm going crazy.
any suggestions?