Im using a Solus v8.4 and tried it in both heritage and new software, what difference does it make on a common vehicle like this? I would get the same info using one of my other machines.

As i said, the live data is ok before the fault occurs. You cant watch it during choking up as it just suddenly gives a cough and does it. And during the fault the live data is ok apart from the o2 which sits around 800mv, the injection pulse is a little high which you would expect from running rich.

Other than that it seems ok.

The fault happens quite instant. Bring the throttle up to 2700rpm and it gives one cough and over fuels and starts to hold back slightly, bring the revs down slightly to about 2400rpm and it smooths out and starts to run nice. Its quite hard to hold a steady fast idle speed for the MOT.

The gas readings and the live data all indicate the system runs rich when the fault is present, you would think the lambda sensor voltage would make the ECU back off the fuel.