So here goes...
The gti was sent to vw with numerous problems including the common hpfp/intake cam problem so they were replaced with autotech internals and a S3 cam. Although its running better it is still getting a 'fuelling issue' under boost. Fuel tank and filter have been checked and swarf was found which im guessing is from the cam wear, also found some on the crankshaft positioning sensor magnet.
This is what has been checked and is fine:
Plugs, coilpack, maf, fuel pump, hpfp, intake cam, dv (latest revision), new ecu tried to exclude remap.
Does anyone have any ideas what could be wrong with it, both me and vw are clutching at straws! Im thinking injectors or possible split in the loom.
Cheers Martin