I'm surprised the dyno operator didn't shut it down with the AFR being in the 14's in the first place. I know that Dynotech(dyno home of SZ05 & SZ06) will shut it down once it gets anywhere near unsafe levels, or an AFR specified by the owner of the vehicle. It wouldn't hurt(other than your wallet) to hop onto another dyno, or find someone with a wideband that you can borrow.

Mark

2000 Black CSVT 3.0L Hybrid - 206fwhp & 195fwtq