been noticing a very starnge problem with my rs when it comes on boost. it was chipped, new -31 fitted and all set up a few weeks ago. The problem is in any gear when i boot it it will peak to 10psi and hold 8 or 9 which is fine but when i'm in 5th and boot it it will boost up to 10psi but once it peaks the boost just drops to 0. very starnge any ideas???