Car still idles rough/runs rich after 2 months work - I'm at a wall

[davidsxj6 (David)]

Radiators are not grounded.
To my knowledge. That is, if you mean the radiator and not bolts next to it.

@Kirbert

The only way you can get electrolysis is if the radiator is grounded.
The OEM radiator is not grounded, it’s mounted entirely in rubber.

– Kirbert

ECU grounding sounds good, try cleaning everything… hope that’s it!