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Re: tcs 900 SE V6 how does it work?
Posted by Anders (more from Anders) on Fri, 11 Oct 2002 20:28:05
In Reply to: tcs 900 SE V6 how does it work?, Dave, Fri, 11 Oct 2002 18:52:38
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Where the air goes into the engine, you have two butterflies. One is operated by the throttlewire from accelerator pedal, and the other one is operated by an electric motor, mounted on the electric part of the throttlebody.
If you look closely in the area of the throttlecable, you see a square block mounted between the air intake hose and intake manifold. That's the electric motor/throttlebody.
That motor keeps the butterfly wide open as soon as the engine starts, and stay wide open all the time when the car is driven under non slippery conditions. The butterfly operated by the throttlecable is the only one adjusting airmass.
If for any reason one of the driving wheels should slip, the electric motor closes the second butterfly and thus reducing airmass intake and subsequently power to the wheels.
The electric throttle body sometimes goes bad, and can be replaced pretty easily.
If you go to a Saab shop that have a Tech2 Scanner ( all Saab shops should have one by now) they can force run the electric motor and see if it's acting up.
posted by 66.134.55...
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