Symptom: - Stage 1 remap that boosted well to around max 13psi. Over the last couple of days, it's started boosting to around 6psi only and a fairly audible whooshing/rush of air noise is heard on deceleration. It never did that before and it doesn't do it on acceleration, oddly. The car is fitted with an analogue boost gauge, connected to the vac tree.
I have replaced and done: A vac smoke test and replaced all perished hoses. I have fitted a new OEM Pierburg TCV and a Forge Motorsport Diverter/recirc valve.
I will be checking my wastegate arm/movement tomorrow as a next step. Any pointers appreciated.
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