This ECU (MD166267) came out of a '91 E35A Eterna Sava I just picked up. Luckily I had an ECU spare I was able to fit and get it running. My question is does anyone know what specific bit(s) burnt out? I know of an issue where if the ISC shorts it can lead to the ISC driver on the ECU burning out. The ISC on this car appears to be working just fine but I thought I would ask anyhow as I don't want a repeat of this happening to the ECU I've just put in.