I'm just relaying what my mechanic told me. In my other post i talked about sonething similiar but some mechanics said to me that black smoke "can" be normal. But I'm out of my depth here.
Ecu is usually under the driver footwell? Or ive seen it sometimes on passenger footwells. Couldn't see it either.
If it hasn't been tuned, is it even possible for a car to run well (meaning it feels normal when driving, not thinking about A/F ratios and such) if it hasn't been tuned on a aftermarket ecu?
Either way needs a tune, I'll leave it to the professionals.