Car smokes only when you start the car when it's sat overnight. It takes about 10min for it to start smoking. After about 5min it stops smoking, and repeats the same process everytime I start it up when it's sat overnight. I am going to try and neck down the oil supply line with some nitrous jets to see if that works. Has anyone else had this problem with the powerhouse kit? My return line looks fine and was the one that came with the kit so I don't think it's that. Any suggestions would be great. Thanks.