406 1.9 Turbo Diesel Throttle Shock absorber

Gents
My throttle does not always return to normal idling speed of 950 RPM but
settles at about 1200 RPM.
I have looked at the diesel pump and found the cause to be the throttle
shock absorber which is used as a spring to return the throttle to idle
speed.
I have been to the local Peugeot dealer and quoted £114 for a replacement
for me to fit. The part is made by BOSH and has a Bosh part number. Any
ideas where I might be able to obtain a new one. Having taken the part off
which is marked with legend STARTER SHOCK all seems to work normal. Apart
from returning the throttle to slow running does this part perform any other
function and therefore can I run permanently without.

Thanks
Mike

 

should be ok without it

 

I was watching this one with interest,
what makes you think that?
I've scratched my head over that little shock absorber.
It must be there for SOME reason surely?
Is it just to stop the shut-off being a bit abrupt?
The old TD and Non-Turbos didn't have them.

jim..

 

should be ok without it

It's a damper, not a shock absorber. It is there purely to slow the return
down. Most of them on older engines are shagged anyway and have little
damping effect.

You are checking the idle speed when the engine is warmed up, as the cold
running device does speed the idle up to about 1250.

Brian.

 

Thanks Brian

With the shock fitted the throttle doesn't mechanically return to rest when
your foot is taken off the accelerator pedal. but opening the bonnet and
pushing the throttle on the top of the pump causes it to move the last
little bit until it has shut down and then idling speed is obtained (when
warm). On the other side of the throttle leaver is a diaphragm device (price
£43) which makes contact with the throttle leaver on the pump. The job of
this seems to be to oppose the shock and prevent the pump throttle leaver
returning quickly to rest when your foot is taken off the accelerator.
These two components seem to oppose the action of each partially. I did
wonder if part of the reason for the shock was to improve emissions in some
way. ( mine has some pressure in it only when the throttle is fully open and
hence at this point acts as a sort of spring assister to the return spring
on the top of the pump. On my engine the fast idle speed is controlled by a
vacuum operated diaphragm which operates a cable to the pump.

My question on the action of this shock was to see it there would be a
substitute for the component that I think may be faulty and the price of
£114 seems to be very excessive even by Peugeot standards unless any one has
an alternative source. My unit was marked by BOSH and has a part number 1
467 032 010 on it.

Thanks Mike