My manual boost controller failed tonight, 2 days before my autocross. It's probably the spring (this is the FM2 kit issued BC). Boost goes to its set limit of 16ish, then drops to 12, then later on stopped going above WG default (8psi) and occasionally spiked to 12. I tapped it against a screwdriver a few times and the next pull it worked better, but still spiked and dropped to 8psi..

Sadness.