I have a battery relocation that I belive is making my Megasquirt mort complicated than it is worth. The battery relocation has a 6 ga wire going from the positive of the battery to a powerblock in the engine compartment. The engine and negative battery terminal are grounded to the frame. The MS main power/fuel circuit relay is on a chasis ground next to the front strut. All of my sensor grounds are gounded out on the part of the firewall that extends out to allow for water to collect from the windshield. I was having problems with the stock ECU making loud pitched ringing when I had the sensor relay grounds sharing a ground on my valve cover that was also connected to the frame with a 6 quage wire. Even though the ECU was making new the MS computer came on sometimes. Now I have the current configuration the MS doesn't come on at all.

Any ideas?