it has been mapped by nms an is runing to 2.5 bar,,,the loom has been rewired by motorsport solutions(pectel style)..it just started doing 1 day when i was in 4th an put my foot down,,,is not getting worse or better,its the same...

u can feel the car juddering,

not sure about the fuel filter but im going tochanghe it.......i got 1 of those air an fuel gauge in the car an sometimes runs too lean,,,could that be the problem?u reacon it will need to remapped?