What else ? '88 Audi 5000

Bernard Littau bernardl at acumenassociates.com
Tue Aug 13 00:38:00 EDT 2002

I move we ban non-turbo 5000's from the list :-)

OK, sorry, missed the non-turbo part.  Scott's site is still a marvel, so if
they had not seen it, great, I was of some minimal use in that respect.

Check all the temperature sensors in any case, even the non-turbo ECU could
limit power if it thinks that the car is cold or overheating.  It's possible
the ignition never advances much to limit the power and heat.

I recollect no mention of any O2 sensor checks.  You should make sure the O2
sensor is good.  A fast volt meter should read 0.5 V nominally once the car
is warmed up and at idle, but it should fluctuate between 0.4 and 0.6 V (or
thereabouts).  0.5 V steady is not good, and hanging around 0.2-0.3 or
0.7-0.8 would be bad.  Usually, people who have a fast enough volt meter
also have an oscilloscope, which is better :-)  A new O2 sensor can be had
for 30-40 dollars, if you can find a generic replacement and connect the
unique Audi harness yourself.  Don't know if this applies to non-turbo, but
Check to make sure these work in a 5k.

The exhaust back pressure can be a problem if the catalyst is getting
plugged.  An exhaust back pressure test is not hard to do for a muffler
shop -- they drill a hole ahead of the catalyst, and mount a gauge, test,
then braze the hole shut afterwards.

If all else fails, especially if the car is new to you, and this low power
is not a recent thing, check for the cam being off by one tooth.


Bernard Littau
Woodinville, WA
'71 Ford F100 non-turbo non-quattro :-)

> Spoken like Arnold Swarzenegger(sp?) in "Kindergarten Cop":
> "It's not a turbo."
> (he says "tumor" in the movie)
> At least that's what the sig. says, if the car is the same.
> I don't know what else could be checked beyond what's been posted.
> Ken
> Quoting Bernard Littau <bernardl at acumenassociates.com>:
> >
> > > Big thank you to everyone who has written to us!
> > > Lots of good advice and suggestions which have saved us a ton of
> > > headaches so far.
> > > We are still plugging along.
> > > Not great power . . .
> > >
> > > These have checked out okay ~
> > [snip]
> >
> > Have you seen Scott Mockry's site?
> > http://www.sjmautotechnik.com/
> >
> > Specifically, the low power (low boost) section:
> > http://www.sjmautotechnik.com/boost.html
> >
> > Low power (low boost) could still be the throttle switch, or
> one of several
> > temperature sensors.
> >
> > Best,
> >
> > Bernard Littau
> > Woodinville, WA
> > '88 5ktq
> >
> <snip>
> "Jim's '88 Audi 5000
> 2.3 liter engine
> No Turbo, No Q"

More information about the quattro mailing list