Date: Fri, 2 Apr 2004 17:41:00 -0500
Reply-To: Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: Random Oil Buzzer
In-Reply-To: <20040402212651.93547.qmail@web41008.mail.yahoo.com>
Content-type: text/plain; charset=us-ascii
The over 2K rpm buzzer is activated by the high pressure switch located
at the rear of the engine. The switch closes and completes the ground
circuit when the oil pressure is sufficient. A poor or open connection
will sound the buzzer so I doubt dampness is a problem here. If the
buzzer is actually sounding much below 2K rpm, then there may be a
problem with the board for it or it is getting an erratic tach signal
from the ECU or distributor pick up coil. Once the buzzer does sound at
>2k, it will continue to sound until the switch circuit is completed,
even if the engine rpm goes below 2k.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of eric unrau
Sent: Friday, April 02, 2004 4:27 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Random Oil Buzzer
Hi All.
I have had a few oil pressure warnings on my '89 Westy
lately. The first time it happened I shut off the
ignition, coasted into a parking spot and checked the
oil. Everything looked OK so I started the engine,
the buzzer came on immediately - below 2000RPM and
above 2000RPM the buzzer sounded steadily - so I shut
the engine off for a few minutes and tried again.
This time there was no buzzing or lights flashing so I
turned around and drove home - about 10km - and
changed the oil and filter that night.
The next time I used the van, a few days later, I went
for a 50km drive without incident and thought that
somehow the oil or filter change had solved the
problem. A few more drives without incident made me
believe that the problem had disappeared, until a
rainy night last week when the buzzer turner on and
off repeatedly. It was then that I remembered that
every buzzer incident occurred on a damp or rainy day,
so I had a look at the wires that run to the oil
pressure sensors and sure enough there are a couple of
spots where the insulation is very worn. I'm guessing
that the sensor wire isn't worn enough to ground out
on the engine all the time, but when it gets wet the
circuit closes. Does this seem like a resonable
diagnosis?
Either way, I'd like to replace these wires. How do
you get at the high pressure sensor? Do you have to
remove the water pump pulley?
Eric
'89 Westy
Vancouver, BC
______________________________________________________________________
Post your free ad now! http://personals.yahoo.ca
|