Looks OK for the idle but a lot for partial throttle and as the both banks are affected I would be more inclined to look at fuelling rather than air leak.
You say fuel pressure was 4 bar without FPR and 3.5 with FPR. Is in not supposed to be about 7-8 from pump and 4 with FPR? Any possibility to measure it while driving to see if it drops at load?
It could still be air leak in exhaust as it has had work previously done to it, could be a hole or maybe air leaking in through the O2 sensor thread. Leak can even be downstream from O2 sensor as the exhaust pulsing sucks some back higher in the exhaust. I would expect it also to affect idle but maybe at idle there is not enough pulsing to suck it upstream.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
Last edited by ainarssems; 3rd October 2016 at 06:12 PM.
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