A common problem with these cars is that a little rubber hose inside the ECU housing gets old and splits. I’ve been taking things apart to see if I can find anything that got wet and decided to take the ECU apart to see what mine looked like.
Yes, that little black hose is the one, and the area where the gooey black mess around it is where it is broke! This is likely the cause of my ‘limp mode’ issue I’ve been having. If the engine ever runs again I’ll find out for sure.
