Date: Wed, 12 May 2004 14:05:47 -0400 From: "Fred W." <Fred.Willsnospampam myrealbox.com> Subject: Re: Where to buy BPC-valve / APC -valve?
"Zon" <johnnospamy-to-group.please> wrote in message news:1084300253.669989nospam.vaisala.com... > > That's exactly what happens, and the reason that made me think it is BPC > valve that is shot. Ah, OK. This is the less usual failure mode then. Usually the failure is that you never get full boost, you get base boost only. In your situation you are getting a failure to limit the boost. What happens if you unplug the APC solenoid? Does it then drop to base boost? If so, you still have a control problem. If you still get max boost and hit the pressure limit switch the problem is that the wastegate is not being operated. You'll want to see if you can manually move the wastegate. Then try moving it by pressurizing the W hose with a pump of some kind. Also, check that you have pressure coming out of the W port on the APC valve with it unplugged. -Fred W