For some reason when I get on it, my boost gauge doesn't read- it stays at 0. I even installed a cheap HF boost gauge in parallel, T'ed off the same line, and the car is in fact making the boost it should. If I bench test both the gauges by supplying regulated shop air to the vacuum lines, the HF gauge reads exactly what my calibration gauge reads, and the stock gauge reads what it did when I calibrated it when I put the Hilton boost overlay on it- accurate at 0-10 psi, 2psi low at 23psi. Has anyone else run into this?