lack of power issue

[Nick Lawrence]

If I already replied to this sorry...but here goes.
I had the same problem, in the lower intercooler hose is a sponge filter or
something. It can/does come out of place and will make a very good throttle
restrictor.
My car would start, idle, run ok but no boost, not even 1.0, and wouldn't
rev past 4k.  I figured it ot first by completely by-passing the turbo as
part of the intake. Ran like a NA car!
Nick
----- Original Message -----
From: "michael" <kazin-audi at thismetalsky.org>
To: <quattro at audifans.com>
Sent: Thursday, October 21, 2004 6:44 AM
Subject: lack of power issue


>
> Car: 1990 200 Quattro 10v turbo.  TAP chip and wastegate spring, K&N
filter,
> both installed by previous owner.
>
> Symptoms: In gear, RPM won't reach 4000, severe loss of power, feels like
> there's no difference between 10% and 100% throttle, boost never above 0.9
bar
> as indicated by stock digital gauge.  Car struggles to accelerate, to get
up
> hills, etc.  This started suddenly, no indication, no noises, nothing.
>
>
> Replaced: thermostat, multi-function temp sensor, throttle position
switch,
> plugs, wires, distributor cap & rotor, coolant, fuel filter.
>
>
> Tested: compression looks good
> intake path from airflow sensor pressure tested, no leaks whatsoever
> ECU reports 4-4-4-4, no check engine light
> all fuses intact, all necessary relays present but untested
> audible whine from fuel pump
> turbo spins freely, no shaft play
> throttle opens and closes properly, and fully
> spark plugs a medium-light tan color
> temperature as indicated by dashboard gauge appears within range
> idle stabilization valve seems to buzz happily
> idles fine (other than minor warm start issue)
>
>
> At this point, I think the next things to try replacing are going to be
> expensive.  I'm guessing it's a fuel delivery issue, the fuel pump sounds
a
> little sick.  Though I'm comparing that to the Walbro pumps in my other
two
> cars, I don't know if they're supposed to sound the same.  I also thought
> possibly it'd be injectors, or some part of the fuel distributor setup.
> Really, I don't know these cars well enough yet.  Also, I plan to change
the
> oil... not that it will make any real difference.
>
> I read that there's a screen somewhere in the fuel distributor that
sometimes
> gets clogged, have not yet taken it all apart to test this, it was to be
my
> next step.
>
> I do not have volume 1 of the Bentley manual (though I have the other two,
> previous owner must have misplaced that one).
>
>
> Anyone have any ideas?
>
> --
> Michael Stella - http://www.thismetalsky.org
> '97 AWD Eagle Talon & '92 Galant VR4 #1000/1000 & '90 Audi 200 Quattro
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