ok, today i put on pfc which pretuned with similar set up i got , then drove home and sat in the car for a few mins when the car was on , then there was a werid knocking noise came up, it sounds like when you drop a thing on the floor or someone uses a hammer hit underneath the car , cos my feet could feel it every time it knocks , and it is random , came up once then 3 seconds later another one , then after thirty seonds three in a roll, any ideas what it could be , gonna put back on the stock ecu tomorrow, just wanna hear what you guys think BTW it never happend before until i put on the pfc, cos i definately would feel it if it happened before
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