Will a boost gauge tell me if I have a torn TBB?
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Mine tore and my boost gauge would tell me that I would spike to 15 lbs and then go straight into limp mode which limits boost to 5 lbs. So a bad tear that causes limp mode is easy to diagnose. For a small tear I would try pressurizing the intake tract and then use the boost gauge in the car to monitor the pressure versus time.
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