Date: Wed, 21 Aug 2002 16:36:35 -0400
From: KeithG <noonenopsamspring.com>
Subject: Re: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)
Lee,
They replaced the part I would suspect 3 times. It shows you how much I
know... I think I would have to get to know Trionic a bit more to hazard
another guess. I would disagree, though, with some of the previous logic
used, but what do I know. Have they looked at the pressure transducer
its hose, fitting or its wiring? Is it possible that the pressure
transducer hose could be a problem or the transducer itself? From my
limited understanding, I would guess that the system, somehow, does not
know that the pressure has exceeded normal values. I could imagine a
pressure transducer which is nonlinear and reports decent values back at
idle and vacuum and becomes nonlinear and under reports pressure at
higher pressures. A wastegate would stand an outside chance of causing
this, a BPCV could do this, too. If the system is operating properly
(still an IF, but mostly confirmed) and still overboosts, it HAS to be
that the pressure signal is not reported correctly to the system. Does
it do this all the time? Does it do it cold and hot? Over bumps and
smooth pavement?
Just some ideas YMMV!
KeithG
Lee Marshall wrote:
> Back in May I posted a question on this group about an overboost problem I
> have with my 9000 Aero. I received a lot of replies (particularly from
> AndyH, cheers!) so I thought I would update you all. Here's a brief summary
> of the original problem:
>
> March 2002: Under load the turbo has started to overboost, leading to fuel
> cutout.
> Between March and July: Dealer replaces Turbo, Wastegate, Boost Pressure
> Control Valve (3 times), ECU and checks wiring several times. Problem not
> fixed, service manager has no idea but pledges to fix the problem.
> July: SAAB warranty expires
> Late July: Dealer says they cannot do anymore repairs under the warranty
> because they will not get paid, they have already put on £2000 in parts. I
> have a "discussion" with the MD who agrees to continue the work.
> August: The desperate service manager suggests (after receiving advice from
> SAAB GB) replacing the head gasket as he thinks it is leaking and causing
> the problem (I think it's a result of the overboost, not the cause). Gasket
> replaced, head skimmed, problem still there.
> Today: SAAB GB suggest replacing the exhaust system (I suggested that in
> April and was told that could not cause the problem).
>
> I should find out tomorrow if the exhaust system has fixed the problem.
>
> Needless to say, I am very disappointed with SAAB GB and my local dealer,
> County Saab (was River Garage). I think that six months is totally excessive
> and I can honestly say that I will never buy another Saab again. It's not
> because of the car, I love the Aero, it's because I will never let County
> Saab touch one of my cars again.
>
> If anyone has any other suggestions, please let me know.
>
> Thanks
>
> Lee
>
>
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