Question about 1997 Saab 9000

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9000 2.0 turbo idles at 4000 rpm

Have a Saab 9000 turbo 2.0 1990.
It idles at about 4000 rpm have to unplug the idle air valve to drive the car.
Tried to replace the valve but it is the same. What can be wrong
br. Helgi

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The valve is stuck.

Posted on Dec 21, 2008

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You need to provide more information about when this happens:

hard accelerating? (likely poor quality fuel, dirty plugs/engine causing knock) and general driving similar.

idling? possibly a knock sensor or ECU related problem

What rpm? what boost gauge pressure?

as an outside chance, maybe a sticky wastegate

Saabreur

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