[audiblypry]

Was getting random boost spikes on my ‘86 930 — thought it was the WG spring or overboost switch.
Turned out to be a cracked vacuum line to the wastegate! Replaced it with high-temp silicone hose, and now boost holds steady at 0.8 bar.

Old school fix, but worth checking if you’re chasing boost weirdness.
Anyone else dealt with this?