Oil pressure warning at 2800 rpm, 1988 90Q

[Huw Powell]

> Step 1 - NEVER ignore an oil warning light.

Very much in agreement on that.

> Now that i have said that. The 2800 rpm is a give-away.
> Your oil pressure warning system is based on two sensors that must be in 
> agreement.
> OFten when one goes out of calibration, they fail at certain 
> frequencies. It happened to me twice.

Well, not quite.  The low pressure sensor is read at low rpms, and above 
~3000 rpms the high pressure sensor is read.

> IIRC, the 2-wire is the high pressure, the single wire is for low pressure.
> Huw can correct me

That is correct.  The two wire sender is both the high pressure switch 
and the sender for the pressure gauge.

If you short the correct wire to ground, the warning should go away.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/