if its low rpm maybe an inlet manifold air leak? usually when the turbos boosting sufficiently it masks small leaks. try having the engine idle and spray wd40 around the manifold, if the revs rise its an air leak in the vacinity of the WD40 spray.
maybe split in hose from AFM to turbo, again maybe slight so that its being masked when boosting?
__________________
Racing is life. Everything else, before and after, is just waiting.
- Steve McQueen
|