Away from home and losing power

Mike Robinson quattrofan at
Mon Dec 23 20:35:52 EST 2002

It's deffinately the knock sensor.  I just replaced mine on Saturday and it
makes a world of difference!  I had the same flickering thing too.  Check
the codes.  It is a real easy fix, just be sure to torque it down properly
if you want it to last.  Proper torque is 15 to 18 ft-lbs.  I set my wrench
to 16.5 (can't go wrong).  New sensors are 40 bux or so from the parts


Mike Robinson
1988 Audi 90 quattro
244,000 miles and runs like new now

On 12/23/02 1:55 PM, "Jim Green" <jeg1976 at> wrote:

> --- "Joel A. Frahm" <frahm at jilau1.Colorado.EDU> wrote:
>> Hi all, happy holidays.
>> I drove my 1988 Audi 90 Quattro about 1000 miles to
>> visit my folks near
>> Milwaukee, and now the car isn't running right.  I
>> think the first symptom
>> is that the 'check engine' light started coming on
>> after 20 min. or so of
>> driving.  It doesn't some on steady, but rather
>> flickers at a high rate.
>> The car also seems down on power and won't rev over
>> 4500 RPMs.  One known
>> problem with the car is the multifunction
>> temperature switch/sender.  My
>> inside temp gauge does not read warm until after the
>> car has been driven
>> for a while, and sometimes I think it reads low.  I
>> bought the car
>> recently and have not checked or changed the timing
>> belt.  I do know it
>> has a new fuel pump however.
>> Any guesses what this might be?
>> Thanks,
>> -Joel.
> Knock Sensor?  When I was screwing with mine, that's
> exactly what would happen when it was disconnected or
> not torqued down right.  Start by pulling the codes, I
> have a few spare knock sensors I can unload if you
> need one, and can ship it any day except for um, wed.
> HTH,
> =====
> Jim Green
> '89 90tq 034EFI, Haltech IG5
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