So car is all fixed, the guys at Redline had no clue how the car was running, the fuel pump harness was crushed between the frame of the car and the tank, the wire deteriorated and made contact a serious ground loop( this explains -4v )
so they replace the entire wire end to end..car runs as it should
Also fixed the leak from the passenger side by plugging those holds at the cowls.
Let's hope this solves my issues, because I have already ordered all my suspension upgrades!