Can someone please help me, my r33 skyline auto is a 1993 its stock, i put a blow off valve on it (aftermarket) i was told by RACQ that this wud cause backfiring? is this so ? and that it wud make the car drink lots of fuel, even when my car had stok everything it was drinking to much fuel. 5km to the litre.
something is rong can someone help me as wat i shud do please.