Why you running a 4bar FPR on a stage 1 map?
Ignore the IDC,s I always saw 100+% when logging on Revo stage 1 and 2.
Lean on the wideband: Any exhaust leaks? Boost leaks? N75 duty? Any fault codes?
On my stage 2 i ran the wideband setup in the second lambda position (decatted), then...
I should update this to close it out as the car has pretty much been scrapped now albeit for a lot of the panels like doors etc, wheels, ECU and FMIC setup with Forge Supersize DV.
I'll get some pics of it being stripped soon.
I've not seen on track checking at Pembrey, Llandow, Combe, Rockingham and Silverstone when i've done them.
Not had any issues with sound either when i used mine, 3" straight through single box.
Have you had issues with failing the test?