Hank,
I am 100% positive that I can distiguish the sound of the turbo from
the sound of a vacuum. The nail that secures this observation is the
hissing sound of vacuum leak that can be heard when you park in a
quiet place and shut the car off... with the engine not turning (ergo
turbo not turning) you can hear a short 'SSSsss...' In fact in all
instances the sound is evident when the turbo is doing little or
nothing.
I realize the turbo may not be vacuum dependant but the rest of the
system is. The other information you mentioned is, however, very
useful. Based on what you've written I can perhaps draw closer to
assuming it's one of these one-way valves that I hear leaking.
Again, the problem is not the turbo nor is it in accellerating. The
problem is idling and stalling when engine RPM are dropping to and
through the idle speed.
How do I determine if the one-way valves are faulty? I believe I have
some idea of how they look (like a little plastic pilgrim-hat in a
metal clip) but I may be way wrong. I think I have seen a red and
yellow one in the driver's footwell and there is a light-blue one
under the hood on the firewall. How many more are there?
Thanks for thinking this through with me.
Regards,
blurp
