1992 B2600i Running Rough

I'm not stupid. I know what I'm doing when it comes to vehicles just not use to a b2600I. I know the difference between a check engine and codes. I took it to a shop were they KNEW what they were doing so I can't tell you exactly step by step.

It was my ecu I got a rebuilt ecu for free from a friend.

Free? That's a good friend right there!

No kidding a very generous friend. Now that I have been able to drive this truck I have successfully turboed it.