How long will it take for the adaptive values to reset if you don't have a Nanocom or other device. Mine has been running rich due (I hope) to a poor ground from the MAF. Its now fixed, at the MAF I have a good battery voltage supply, a good earth and the MAF sensor is reporting 1.45v at idle rising to 2+ volts on throttle (no load). She is still running rich, and I've replaced one of the lambda sensors which is reflecting what the other is showing, it thinks its running lean (4.9 - 5 volts).
So is this a wait for the values to reset or another problem?