Date: Mon, 6 Mar 2006 18:58:05 -0500
Reply-To: Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: permanent fuel pressure gauge
In-Reply-To: <000101c640a8$15bc6770$e1e4fe42@jbeauliexp>
Content-type: text/plain; charset=us-ascii
I think full time monitoring of fuel pressure is a bit crazy.
Ok, so you see a fuel pressure change, is it electrical, is the pump
sticking, did the injectors fail to fire, did the pump suck a rock, or
maybe a filter is clogged. Still tells you nothing.
Maybe we should monitor every electrical connection back to lights on
the dash board. One for each injector, and a meter on each sensor.
In general, the fuel system will work or it doesn't. When it fails, it
is usually sudden and you will still have to do some trouble shooting.
Oil pressure sensors are electrical devices and they are not rated or
designed to carry gasoline. Imagine one leaking and then a sparking
ground connection.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of jake beaulieu
Sent: Sunday, March 05, 2006 5:57 PM
To: vanagon@GERRY.VANAGON.COM
Subject: permanent fuel pressure gauge
Hello,
It is easy enough to rig a temporary fuel pressure gauge to diagnose
engine
problems, but this doesn't help you when your driving down the road and
it
starts acting up. Wouldn't it be nice to be able to monitor the fuel
pressure in real-time? What about installing a VDO pressure sender in
the
fuel rail and then running it up to the oil pressure gauge? My oil
pressure
gauge goes up to about 5 bar, which is about 70 psi. This would work
great
for the fuel system which runs around 32 psi. The only other addition
would
be a switch to toggle between the fuel pressure and oil pressure
senders.
For those of us who already have an oil pressure gauge installed this
would
be a pretty painless addition since the senders are pretty cheap.
Any thoughts?
Thanks,
Jake
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of
Roger Van Till
Sent: Sunday, March 05, 2006 5:14 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: intermittent stumbling, stalling etc
Have you checked fuel pressure AND flow?
Is your CHT sensor good? You can check that with a meter at different
temps (ambient air vs. after a hot water bath).
Roger
On Mar 5, 2006, at 2:50 PM, jake beaulieu wrote:
> Hey everyone,
>
> Alright, I have an 82 air cooled Vanagon, Federal model, so no O2
> sensor to
> worry about. When running the van will unexpectedly begin to totally
> bog
> down, total loss of power, barely able to keep it running. If I let
> up on
> the accelerator it will die. When restarted it will continue to do
> this for
> 1-10 minutes, then all of a sudden it will run fine again. 5 minutes
> down
> the road it will do it again. Sometimes it only last about 30
> seconds, then
> runs excellent again. So it is an intermittent problem, a very
> frustrating
> type of gremlin to chase. I have spliced new terminals to all of the
> fuel
> injection grounds (including the tranny to chassis ground). I am not
> sure
> where to look next. If it is some sort of intermittent short in the
> wiring
> it could be anywhere! Any ideas out there?
>
> PS. The AFM checks out according to Bentley
>
> Thanks,
> Jake
>
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