I have done the gas test first thing today. I thought they were more all over the place but looking at them now they may not be.

_________IDLE___2K____3K____4K___IDLE

CO_______0.75__0.62__0.52__0.55__0.59
CO2_____14.63_15.70_15.90_15.92_15.39
HC________364__146____85___90___410
02_______1.99__0.81__0.57__0.52__1.11
LAMBDA__1.054_1.012_1.007_1.004_1.017

STFT - -11.4/8.6 but had a average of 3.5% This should prove fuel delivery/quantity is ok?

I scoped the O2 sensor using the sensor earth and it now switches between 0.011v / 0.900v. So does this mean that the 0.75v on the earth is a floating earth?

I'm starting to think that the aftermarket cat is no good!!!

Many thanks
Andrew