fuel machine was broken so they were checkin the fuel by the way the curve was coming out
"Checking" fuelling by looking at the power curve AFTER the run is just plain mad, tells you very little and is asking for an expensive meltdown.
Its a bit like reading your heart rate just as you finish the two hours of treadmill work.
There's NO WAY that any self-respecting RR operator would map an ECU or a chip without a fully functional wideband lambda sensor. Walk away now - this is why your hard earned money has resulted in you losing 30bhp.