oil pressure strangeness in 4kq

[Thompson Smith]

Did you try swapping out the sending units with known good ones? That would
be my first step. I can remember this happening to my 'ol '85 4ksq. Your
high rpm oil pressure sending unit (2500rpm on up) is not working, and
triggering the buzzer and oil pressure light would be my guess. Although
when you ran it at 3000rpms it worked. Might also look at the top sending
unit connection. Try some Wurth Contact Oil spray or Stabilant 22.

Audi Gods are getting back at you from lack of use...
Thompson

> Message: 5
> Date: Wed, 27 Nov 2002 21:07:59 -0500
> From: Bob <bob at audisport.com>
> To: quattro <quattro at audifans.com>
> Subject: oil pressure strangeness in 4kq
>
>
> Having strange issues with the oil pressure light/buzzer  on my 4kq.  It
> has been sitting for about 2 years, started it up with bad gas and all..
> ran fine of course :)
>
> Driving it along though, oil pressure buzzer and light come on at about
> 2500 rpm. Back off, it goes off. Hmmm..  2 year old oil I figure. So I
> go home and change it and the filter.  Still does it.
>
> Strange thing is, when I start it, the oil pressure light is only on for
> a second or so like normal then goes out.
>
> In my other 4000Q ive bashed in the oil pan, and you can hear the
> lifters rattling away from lack of oil to them, and the buzzer never
> came on. Now when the buzzer does come on, I dont hear lifters at all,
> so Im not really thinking there is something wrong with pressure.
>
> Also, driving down the hiway, at around 3000 rpm the buzzer and light
> went out, so I kept driving. For about an hour at 80mph which is about
> 4000 rpm. No problems at all.
> Im guessing wire is grounding out somewhere or the pressure sender is
> out of spec.  Anyone BTDT on this? First place to look?
>
> Thanks!
> Bob
>