Whell it's alive:slayer:
Congrats dude! I know the feeling when it starts up after all the work
Engine is nice and stable but sometimes goes down in rpm.
Well, get everything sorted out slowly, exhaust etc. Then let the ECU autoadjust for a while, there will be a huge difference.
This I understand is working on the ECOL ECU? I would still strongly suggest getting the other, newer ECU to work with the engine, from what I know it has a better and much more tolerant handling of broken sensors, etc. Also get yourself a diagnostics cable (15 Euro or so at pagershop.nl) and software, check out the ECU reader thread and ycming's (I think) guide.