So after my 03 Passat 1.8t sat for a year I tried to start it and the oil light flashed stop immediately, my tach jumped all over the place and relays clicked like crazy all without starting and running. I opened the trunk with the key and tried again and it fired right up. It seemed alright for a week besides the tach occasionally not moving at all or jumping around even when idling smooth. I started it every day for a month but never drove it while I waited for tags and every day it ran better. I got my tags replaced the fuel filter and went on her maiden voyage and on this 11mile trip the idle became strange and my afr would occasionally hit 22.5 and my vacuum would read 15in/hg so I checked for loose coupler or broken vacuum lines to no avail. I pulled my ecu cover and noticed corrosion on the big 40 amp fuse so I pulled it to clean it and the ecu has not had power since. The fuse is fine I’ve gotten new relays cleaned every connection with corrosion but am at a total loss.