[Supra chick's dad]

Yes, I have a ground cable fron the neg batt side to the block and the trans to the body and the firewall to the exhaust manifold. All factoy points. I am thinking it may mean something in the electrical system is shorting to ground, but how would you know what and where? I also tried un plugging each sensor while at idle and non of the above mentioned sensors (Except the 02 sensor) made any difference in the idle or ability to rev.