Looking at my spare 929 throttle bodies today I noticed a strange valve thingy which either actuates the throttles, or when the throttles are actuated by the cables, it varies something.

It has either vacuum pipes going into/outof it, or, I think more likely petrol pipes.

There is another FPR on the end of the fuel rail, so its not that, is it some kind of manual extra fuel regulator based on throttle movement?

Its purely mechanical not electrical so its not an ICV.

Thoughts appreciated.

ta
Chris

Wax unit
Rescued attachment wax.jpg

Hm.... so how does that work then.

It either operates the throttle, or is operated by the throttle.

It can't be operated by the throttle, as that negates the idle part of its job.
So it must operate the throttle, but I'm sure the lines in/out are fuel, so how does the fuel pressure vary to initiate the idle change?

Thanks!

They are water pipes, so I guess it'ds basically an automatic choke/fast idle device

quote:

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Originally posted by ReMan
They are water pipes, so I guess it'ds basically an automatic choke/fast idle device

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Hope this link works

Thanks Andrew.