Looking for help.
I have a project E30. I rebuilt the engine, adding a few bolt ons and some head work. I also changed the air meter with one from a 3.5 liter. I replaced the board with the one from the 2.5 liter (read this in one of the forums) Engine runs rich, but ran great. I have been driving it and autoXing it, hard. Now I have installed a turbo. I also installed a A/F ratio meter. I am waiting on larger injectors. I know see that the engine, at idle and above, is going from rich to lean, back and forth. When rich, car idles fine, when lean, sounds like having a large cam. I am guessing the ECU is causing this, just don't know why, Any help would be great. thanks, Kenny