Hi guys, this is my first thread here. welcome everyone. i have this erst s2 for 2 months now.
could you please have a look at this dyno test. i know that engine is rubbish now (recent owner didn't care about it much) but i went to a garage to set up afr and check the power.



when i accelerate it goes well untill 3500rpm, then it slows down and when it reaches 4500 it goes well again.

is it a problem in fuel dist and fuel mixture? any other ideas?

cheeRS