Date: Tue, 14 May 2002 11:03:06 GMT
From: (Lee Marshall)
Subject: Re: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)

On Tue, 14 May 2002 08:52:59 +0100, "Andrew Hookins" <> wrote: >Lee, > >The APC solenoid is mounted on the radiator/fan cowling on the >right hand side (looking from the front of the car to the back). It >has three rubber/silicone hoses and an electrical connector. > >This page from Townsends Imports gives the location: > > > >Your looking for part number 179 (BPC valve) > >My OEM pipes are stamped with the letters C, R and W to aid >identification: (C)harge, from turbo output, (R)eturn, to turbo input >and (W)astegate. > >I suppose a blocked charge hose could also give you this problem. > >Inspect each hose and check that they are all in good condition, >remember that the charge and wastegate hoses see boost pressure >and so my have a leak that only opens up under pressure. > >I think that removeing the electrical connector from the solenoid >keeps the charge - wastegate path permanently open, BUT >CHECK THIS WITH SAAB FIRST. Doing this will allow you >to run the car at base boost only (about 6 psi I think). This will >rule out all mechanical and leaky/blocked hose problems. Hoses look OK, but as you said it's hard to check without boost pressure. Just taken the car out with the connector unplugged, as you said I get base pressure only and therefore no overboost problems. > >If you still get overboost problems then you could try fitting a hose >from the charge side of the turbo directly to the wastegate as in this >picture: > > > >Again, this should give you base boost only. NOTE: You will have >to bung the return path. If this fixes it then the problem could be with >the APC solenoid, the TRIONIC ECU or possibly the wiring harness. > I know they have checked the solenoid. Wouldn't a trionic problem register on the diagnostic equipment? If there's a problem with the wiring harness I get the feeling that the delaer is going to love that job! >Hope this helps. > Thanks again for your help Andy!! As a footnote I made a complaint with SAAB GB last week about the length of time this is taking to get resolved. They said "That is unacceptable service, we will contact the dealer to sort it out", I have not heard anything since. Well done SAAB GB.

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