Oil pressure warning at 2800 rpm, 1988 90Q

[Tihol Tiholov]

> ...  It gives me a loud beep and a
> flashing oil pressure symbol every time I exceed 2800 rpm or so.  The light
> stays on as long as I keep it above 2800, disappears only if the engine
> slows down.
>

BTDT


> My understanding is that there is a low and a high pressure sensor on the
> car, but looking at the engine block I only see one, brown.


There are 2, one above the other, both screwed in the block.


>  Is the pressure sender (the big barrel) acting as the high pressure
> sensor?  It's disconnected right now, actually the terminals broke off due
> to rust, awaits fixing.
>

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

>
> I would greatly appreciate some sort of reassurance that it's the
> sensor, rather than actual low oil pressure!
>

It was in my case.  It is important to get a new one with the exact same
part number and rating - there are 2 pressure ratings listed on the
regulator.  Otherwise  the light keeps on coming with new regulator.
Several kinds were used as seen, for instance, at <autohausaz dot com>