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Date: 7 May 2002 19:31:00 GMT
Subject: Re: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)

Someone who looks an awful lot like Lee Marshall <> wrote: > On 7 May 2002 18:02:01 GMT, wrote: >>Please note previous disclaimer; my in-depth understanding of the >>Saab's boost strategies is based on the APC system which I believe >>predates your car. But, the principles remain... > My car does have the APC system (it says so on the boost gauge), so > hopefully your information will be as helpful as it sounds. Ah, well then I'll restate in a more confident manner - I strongly suspect the knock sensor. In the APC system, the only purpose for it is to limit over-boost, and the APC is pretty basic - it measures manifold pressure, engine RPM, and knock. Maybe a wide-open-throttle condition as well (this may be your two-level boost you mention). But, I'll bet you a pint that, especially given all of the other things that have been replaced, it's your knock sensor. They're not expensive, at all. Especially compared with the rest of the parts they started with. Odd, that. Not uncommon, though, to start thinking the expensive bits first, rather than attacking the problem with logic. > The only good thing to come out of this so far is that I know my car > will have had a lot of expensive components replaced which may have > cost me a lot when the warranty expires. Hopefully, you have a loaner car from them for the duration? > I will let you know how I get on. Yes, please do. I'm keen to find out. Best, Dave

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