Hi Fast,

Thanks for the explanation, in future I'll look at keeping the BLM in the 124-128 range or I won't be so worried if it's a bit below 128.

Interesting thing I noticed today while logging, cruise BLM were pretty close to what I wanted but after I filled up the gas tank and they all went rich.
I've fitted a CCP solenoid to my RamJet intake and I'm guessing the CCP solenoid was pulling more than just vapours, I took it for a run out on the motorway to confirm and by the time I got back it looked to have settled down.
I think my 2001 Tahoe's PCM doesn't operate the CCP solenoid if the tank is full, I don't think my 7427 PCM is that clever.

Cheers,
Andrew