Hi, i fitted an N75 J valve and 710n DV befor fitting my boost gage. The gage only shows a peak of 0.3 bar, is this usual? Its an A4 1.8T quattro sport with no other mods (well a K&N panel filter). I have just recieved ny re-mapped ecu from chipped uk, and wanted to know if i should replace the N75 J with the original? what are the opther symptoms of limp mode, does it just reduce the boost, or does limit other things like revs and top speed e.t.c.? Thanks.