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older 9000 turbo problems; Boston mechanic recommendations
Posted by Brett Dikeman (more from Brett Dikeman) on Sat, 4 Dec 1999 11:20:54
Greetings from the Audi crowd,
A coworker who owns an older 9000 turbo is being taken for a ride by
his mechanic and having some boost related troubles(which I'm sure
are just as much fun as Audi related boost troubles :) He described
what sounded like classic overboost fuel cutoff or stumbling under
boost(he didn't describe very severe lurching, so I don't think it
was fuel cutoff.)
Here's the rundown from what he has told me:
-mechanic pointed to 'some sort of valve that controls the turbo
airflow or something' under the dashboard; mechanic claimed dashboard
had to be removed to access+replace faulty valve; quoted him
somewhere between $600 and $1000 to do the job(absurd)
-mechanic took the liberty of disconnecting the APC system by pulling
the fuse, unknown why, but I left it that way(besides, removing the
glovebox is such a pain in the $#%. What brilliant Saab engineer
thought that one up? The same one that wired the sun visors to the
door locks+auto shifter interlock? :)
-we just popped the hood and I took a look around for split hoses in
the intake/charge side, rotten vacuum hoses,etc..and while looking at
what appears to be a wastegate frequency valve(couldn't tell, it was
nighttime, eng. compartment light didn't work well)...attached to the
front of the engine compartment, 3 hoses, all on the same side of the
valve, tie-wrapped together a couple inches down(yikes), and a 2-pin
electrical connector on top; part number on the valve is 7517477, and
'Saab' printed on top(white top, brown sides.) I bumped it, and lo
and behold, the connector comes off; it was barely on. To boot,
there's a piece of paper stuck into the connector haphazardly.
Presumably by the mechanic. How professional, eh? Mechanic also
pointed to this particular valve and told him it was busted. What's
the test procedure? The Audi valve can be measured for resistance to
determine if the coil has fried(most common failure.)
I removed the piece of paper, plugged in the valve, and told him that
if it acted funny(they're driving up for a ski weekend) to unplug it
ASAP. Assuming the APC is unplugged and the valve/wastegate are
failsafe like the Audis, the wastegate will stay open and he won't
get any boost(or minimal boost; the 200 quattro 20v gets 1.4 bar with
the WGFV unplugged, dunno about Saabs.)
The second part to this is he needs a new mechanic. From the
description of how his current mechanic is behaving, I think it's
high time he found a new one, and he feels the same. He's currently
going to some shop in Boston run by 'a husband/wife team.' About the
only shops I know of that are actually -in- Boston are The Benz
Den(mostly MB, but good for many other marques, incuding Audi) and
Auto Bon(mostly Audi.) I have no idea how much Saab business these
places do.
We're going to get together Sunday afternoon to poke around some, see
what we can find, and I'm going to make a concerted effort searching
through the archives and stuff, but since I have so little info,
archives won't be very helpful. I'm mostly looking for a good
step-by-step troubleshooting guide.
Last question:
I've encouraged him to pick up a factory manual. The Audi one is
done by Bently and is obtainable from dealers, parts places, and
amazon.com. What can he expect to pay for them, and where are they
best sourced from(I'm guessing not from dealers :)
Thanks all! Responses before Sunday noon greatly appreciated(but not
necessary!) I am not subscribed to the list, please cc me on all
emails on this thread.
Ever have any Audi questions, feel free to head on over to
www.audifans.com and ask away...the list is unmoderated, but
big(1200+ members)
Brett
'91 200 Quattro 20v Turbo, TAP chip
200q20v listmaster - www.200q20v.com
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