loss of power at 4000rpm with revo stage 2

[chedone]

hi i have a 05 gti with 80k on it recently done stage 2 and i seem to have a loss off power from 4000rpm

originaly i had setting on b7 t5 f7 but have been reading on here and a fair few people are saying change fueling to 9 which i have now done as soon as i did it the car was fine palled all the way through faster than it has ever been but then got in it the day after and back to the same no power after 4000rpm rrrrrrr so anoying

and i keep getting "system to lean off idel bank 1"

i have full miltek
latest DV
changed fuel filter
changing the HPFP cam follower this weekend


im guessing its the fuel pump but dont want to buy a new one then find its not that, also ive read it could be fuel pressure sensor as mine is the AXX engine code

if anyone could shed any light on this it would be great

cheers

simon

[fuscobal]

Well, it's pretty simple to check your fuel pump. Log 230 on vag-com and see requested vs actual. A drop in power at 4000 RPM could be from your fuel pump. Fuel preesure sensor is limited to 130 bar (I have AXX too) but even if it's limiting the pressure a little bit, you won't feel it. If you get to feel the loss of power, then it must be a massive drop (like 10-20bar) !