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Tapping Noise
Posted by John C. Hanes (more from John C. Hanes) on Wed, 6 Dec 2000 11:08:55
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00

<snip>
But I discovered (by chance) another PSI (10/91-0145 'Fuel Pulsation
noise') that states:
'Some 1990-on 9000 vehicles with the 2.3 liter engine may develop a
pulsation noise that can be heard inside the car. Customer complaints
often refer to a tapping or knocking sound that is heard when the car is
idling at a stop. The most likely cause of this noise is a faulty fuel
line damper, located between the fuel supply line and the distribution rail
on the engine... A new damper, P/N 41 64 232, containing a spring-loaded
diaphragm has been developed for use as a service measure. A modified
version of this damper will also be introduced as a running change during
mid-1992 production.'
<snip>

I have this exact same noise; I've always noticed it since I bought
the car a couple of years ago. The thing is, I have a 1996 Saab
9000CSE with the 2.3. By then, surely the redesigned damper was part
of the engine. Nothing's really wrong with the car (other than it
takes forever to start in cold weather, which the Saabnet bulletin
boards think is related to the fuel regulator).
Comments, anyone?

-John
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