Does this look normal for a st205 engine/ecu set up?
I have no CEL and the o2 sensor was replaced by the PO but he ran the st205 swap with the oem 540 injectors with a st185 ecu so he ran it rich at low rpms
Luckily he said most of his miles were Hwy. He said......
A long time ago when I had the gen3 electronics (mr2 ecu) on my gen2 engine the afr's were solid while cruising at the normal 14.7ish afr'shttps://youtu.be/2uanaHEUztw