[s-cars] Oil Pressure Warning on Auto Check System '91 200 TQ

[Grant Lenahan]

Its generally the sender unit.  Audi's system is partly fail-safe 
because it requires that two senders agree within a certain %. It is 
not uncommon for them to slowly go out of calibration.  in an 
unregulated system, the oil pressure varies with RPM, so they could be 
within spec at some RPMs and out at others.

of course, you also might have no oil pressure. So check carefully.  
But I doubt it.

Grant
On Nov 14, 2006, at 7:34 PM, Abe Berman wrote:

> My buddy and I set off from Burlington, VT in his silver 91 200tq on
> Friday and drove both these cars back from Portland, ME on Saturday
> through the white mountains, needless to say, lots of fun.  Can anyone
> help with the question below?
>
> TIA,
>
> Abe Berman
> 93 S4
> 96 A4
>
> ---------- Forwarded message ----------
> From: Keith Franchetti <skidfranc at gmail.com>
> Date: Nov 14, 2006 5:22 PM
> Subject: Oil Pressure Warning on Auto Check System '91 200 TQ
> To: Abe Berman <yellowcuda at gmail.com>
>
>
> Can anyone help with this?  Just picked up this great Pearl '91 200
> TQ.  It's a killer great car, but the oil pressure warning on the
> autocheck system comes on between 2k and 3k rpm.  Above about 2800,
> it's on constantly, so on the highway at least it quits beeping.  But
> around town its on and off constantly.  Previous owner said it's just
> in instrument cluster gremlin, which I'm inclined to believe, as he
> put 75k on the car and said it was a problem all along.  Also, I do
> notice the oil pressure guage tends to run a little low, e.g. mid
> range or lower when idling, and just above midrange when engine is
> working or revving.  Could this be the pressure sender?  Anyone have
> experience with this problem?  Thanks for any help.
>
> Keith Franchetti
> Burlington, VT
>
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