My digital boost guage stay's pegged all the time, I tried putting a new boost guage sensor switch on it and it still doesn't work. Any suggestion's? Tach work's fine.
Check with John at Casper's electronics (www.casperselectronics.com) . I don't know what it is that causes it to happen but, it's the unit and nothing you can do on the car to fix it. Mine did the exact same thing. I exchanged mine for one he rebuilt.