I drove my friends eg si hatchback in town this morning, running perfect. Then I got ready to leave the house after 5 hours I go to leave and put the key in the ignition and go to start it, once I turned the key over there was absolutly no power, stereo didn't even come on. I've checked the fuses, changed ecus, changed the main relay, check all grounds, battery still has power it self. Weird cause it ran and started perfect this morning.

 

What ecu did you change in it to test it?

 

Put a p28 from a running car. Nothing still.

 

Hot wire the starter? Does it crank at least?