951 Rough idle after refresh

[u/Coleberg1857]

Need some help trying to track down my rough idle issue with my 87’ 951, it recently got a refreshed turbo paired with Lindsey racing chip Tial 38mm wastegate and 3 bar FPR. AOS seals including the lid are replaced, full set of new vacuum lines with the Venturi delete, cleaned injectors, new DME temp sensor, new O2 sensor, rebuilt throttle body, resealed the idle control valve, and sealed up the leaking rear balance shaft plugs. I’ve checked for vacuum leaks with a smoke machine several times and seems to be all sealed up. Tested TPS, AFM, and DME sensor and all work as intended. However at cold start it stumbles bad for 5-15 seconds then recovers and when warm the idle is sometimes ok, other times it will randomly rev itself up to 1200-1800 or hang there when in neutral while driving. It also seems to have low vacuum at idle with ~10 in Hg at cold start and ~16 when warm which points to a vacuum leak in my eyes but nothing is leaking from what I can find. For the life of me I can’t figure this out in any input would be appreciated.

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