Sounds like a vacuum leak. The usual candidates on a 32V are either the crankcase breather hoses which perish and collapse, or part of the brake vacuum assembly on the left side of the throttle body - item 24 in the pic tends to split where it joins the throttle body.
The breather hoses can be replaced by standard oil-resistant hose, which doesn't look great but is functional. #24 can be temporarily repaired using self-amalgamating tape. I'm contemplating a small production run of these next year as I need a couple myself.
The other usual candidate for poor running is the coil amplifiers which live under the trim panel behind the air filter box. Scan it with VCDS and see if it has any misfire codes.
21st December 2022, 09:48 AM
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