[Jethrow]

Yes, helps a lot really.

Tho I do question the 14.9 AFR reading for two reasons, the first being that the closed loop should be forcing it to 14.7, and second I have heard from other operators that the testers gear does tend to read leaner than it really is.

That said, if it is too lean, can I tell the ECU it is getting the closed loop wrong? I have scanned the ECU for errors and none are being reported. The O2 sensors fitted are also new items from GM.

Thanks