The knocking is no more!!!! Totally zero... Have checked in various driving conditions.
After doing all I did... I checked the spark plugs and coils... Coils were fine but plugs though proper specs(FK20HR11) were all worn out... The upper tip was deshaped... Changed the plugs with same and engine is back to normal working... Starting is better... Initial acceleration is good...
Idle is still a bit low for which I'll spray carb cleaner when idling into throttle body.. so that it cleans into the intake manifold as well...
Just noticed yesterday that the pipe going from PCV to intake manifold is all hard and doesn't fit firmly... Might be making under a vacuum condition... And there is oil in it...
Oil in pipe coming from PCV hose means PCV ain't working as it should??????