4. I changed the cam and it works well without the unlocked ECU. I might get more power with it unlocked but it works well as it but shows a code light of "reached max limits", but I don't need more power. It runs soooo smoothly now. Probably the way the engine was designed and then detuned with the OEM cams for the EU Pollution spec.
You are getting the max limit error code as the stock ECU map is running out of adaptive range. This means you are running with compromised fuel and/or timing at higher revs and throttle openings. I'd suspect it's running lean as the higher lift cams will be increasing airflow.
The stock 545 cams pre date the EU emissions EU3 to EU4 change but are USA 50 state emissions compliant whereas the 569 cams are not.
