If it happens when you let off the gas pedal, CHECK YOUR OIL LEVEL HIPPIE.
Oil level is easy to check on my car when it stops smoking i'm two quarts low. so I added some. It burns because ive got a big old scar running down cylinder No1 from cracked ringlands
being lazy I sourced a y8 with a spun bearing on a local forum seeing how there in abundance. dropped ina donor piston and rocked that shit. some months later a heard a slight knock dropped the pan found shaving then promtly went to fowee's basement and stole all all his bearing from the a6 blocks down there. Theres a y49 rear uarter down there, It scares the fuck out of me.
so I picked out the choicest bearings put them in and ran it for 6months then I gat an oil light that wouldn't go out unless I held it at about 2500rpms so I went to Oriely and bought some sealed power bearing seeing that fowee's basement didn't have any anymore and the Y49 scared the fuck out of me
"takes a deep breath" put those in and replaced the oil pump with one from a not so abused y7 block that I have.
This motors been through enough it's time for it to rest.