'87 4kq: oil light events

Huw Powell audi at mediaone.net
Tue Apr 24 20:01:44 EDT 2001


> > > Huw Powell posted ~3 weeks ago that oil pan baffles had eliminated some
> > > oil buzzer events on his coupe. I don't have an oil buzzer, but lately
> > > I've sometimes noticed the oil light on my 4kq coming on for a
> > > split-second at a time.
> >
> > the unit that generates the light is *supposed* to buzz as well.  No
> > biggie I guess.
> 
> True, and if this system is like the VW's of the time, (and I don't see why it
> would be different) then there are 2 pressure sensors. A high pressure (near oil
> filter flange) and a low pressure (usually on cylinder head). If the high
> pressure switch goes off, then the light _and_ buzzer go off. If the low
> pressure switch goes off, then only the light will flash. BTW, both switches
> trigger if the pressure is _below_ their range.

the 5 cyl senders are right next to each other behind the water pump
area.  on cars with a pressure gauge, its sender is a dual unit shared
wiht one of the switches.

as I understand it, the Audi 5 cyl system has a low and high pressure
switch - below 3k rpm (roughly) the sender looks at the low pressure
switch and above 3k the high pressure switch.

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/



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