I recently attached my thermostat ground to my starter I am now getting random codes or just one single flash from my ecu upon turning the key. I have switched power available at the icm and coil, and I think the coil is charging bcause I get one spark when I turn key off. No spark or start though. Anybody know what could have fried? My friend's 91 Si ecu shows code 20, elecrical load. what is wrong?