Date: Mon, 14 Jul 2003 08:17:49 +0100
From: "Andy Hookins" <andrew.hookinsnopsamamnopsamodata.co.uk>
Subject: Re: Boost Pressure Stuck


"SimonJ" <Menopsam.net> wrote in message news:bep8u0$dm4$1nopsamta.btinternet.com... > > > 1997 9000cse 2.3 turbo Just noticed my boost pressure in stuck half way > and > > the wastegate has its it's normal hiss and an added warbling hiss on > > depressurization???? Any Ideas > > > > > Sounds like the APC had gone into limp mode (base boost) > > Check the APC valve conections are sound (APC valve is a black solenoid > valve, attached to the side of the radiator, with 1 cable and 3 pipes going > to it, 2 pipes to the turbo, 1 to the inlet trunking) > The valve should make a click when you switch on the ignition. erm, shouldn't that be a buzz? Try disconnecting the electrical connection to the solenoid and going for a drive - this will limit to base boost only. If performance is unchanged then you may have a problem with the solenoid. However, your description of hissing noises suggests a possible leak somewhere - the diaphragm in the standard Bosch recirculating dump valve can tear. Also check all your hoses very carfully - sometimes a leak can open up only under boost pressure. The plastic end caps on the intercooler can crack and leak too. Good luck AndyH '94 9000 CDE > > Check the APC fuse > >

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