[V6-12v] Low Idle + Oil Light = Fix two problems in one?
tomchr at ee.washington.edu
Wed Sep 22 15:04:36 EDT 2004
The oil pressure sensor is a pressure switch, not a sensor per say.
According to Bentley there are two of them (possibly in the same unit) a 0.3
bar and one that's just labeled "oil pressure switch". Both of them go to
the auto check panel. None of them go to the ECU. At least from what I can
see it doesn't look like the ECU even gets the oil pressure information.
From: v6-12v-bounces at audifans.com [mailto:v6-12v-bounces at audifans.com]On
Behalf Of Elliott Potter
Sent: Wednesday, September 22, 2004 12:25 PM
To: Nathan Widmyer
Cc: v6-12v at audifans.com
Subject: Re: [V6-12v] Low Idle + Oil Light = Fix two problems in one?
The ECU doesn't alter idle speed based on the input from the oil
pressure sensor. The biggest factor in idle speed control is input from
the oxygen sensors. Other things that affect idle speed are issues with
the engine, not intentional adjustments by the ECU.
On Wed, 22 Sep 2004, Nathan Widmyer wrote:
> I do keep the RPM's up to warm it up to get the light to go out
> anyway. Well, the oil light has been doing this for a little over a
> month, so I don't think it's the pump. When I change the sensor, will
> the idle go back up because it'll be sensing the correct oil pressure?
> In other words, is the idle computer after the ECM figures out the
> oil pressure the sensor sees?
> On Wed, 22 Sep 2004 14:15:05 -0500 (EST), Elliott Potter
> <mailinglist at eep.burdell.org> wrote:
> > On Wed, 22 Sep 2004, Nathan Widmyer wrote:
> > > As a potentially related problem which happened before the idling
> > > problem was the oil light. The light flashes regularly from a cold
> > > start until the car is reasonably warmed up. I'm thinking that since
> > > the oil gets thinner as it warms up, that something restricting flow
> > > when the oil is thick and cold but dissipates as it thins out. I
> > > talked to my dad and he said we might change the Oil Pressure Sender
> > > (sensor) which an online place quoted $19.
> > If your oil light is coming on, be quick about changing the sensor
> > because it's also possible that your oil pump is shot. Usually if
> > that's the case, you'll get a few days warning before it dies totally.
> > Beware!
> > --
> > Elliott
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