Date: Thu, 9 Aug 2001 09:52:36 -0500
Reply-To: wilden1@JUNO.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1@JUNO.COM>
Subject: Re: Fuel pressure & injectors
Content-Type: text/plain
Have a fire extinguisher handy while you're doing this. I've had a flash
fire doing it this way.
I now use a ten foot rubber hose, an electrical extension for my injector
wires and do this way out from the Westy.
Stan Wilder
83 Westfalia Air Cooled
On Thu, 9 Aug 2001 07:37:02 -0700 Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
writes:
> Michael,
>
> I just did the pattern test not too long ago.
>
> You should be able to tie the belt up out of the way, and what you
> want to
> do is disconnect the secondary coil wire and have a friend turn the
> key so
> that the engine turns for just a couple seconds while you observe
> the spray
> pattern.
>
> I simply placed a paper towel under the injectors. This gave me
> better
> visibility and also caught all of the fuel.
>
> Karl Wolz
>
> ----- Original Message -----
> From: "Michael Townsend" <townsend@RTP.ERICSSON.SE>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, August 09, 2001 6:12 AM
> Subject: Fuel pressure & injectors
>
>
> > You know, while I have my ac compressor removed, it might be a
> good time
> to
> > remove and check my fuel injectors, because I suspect dribbly
> injector
> > syndrome (mediocre mileage and oil that smells like gas). Now, I
> can pull
> > them two at a time and turn the key enough to turn on the fuel
> pump to
> > check for the dribbles. To check the spray pattern, I don't want
> to start
> > the van with two injectors removed and the ac belt flopping
> around. I am
> > also too lazy to remove it completely and bench test it with the
> compressed
> > air method. I was wondering if I just put an external 12V power
> supply on
> > it to pop them open while I have the fuel pump on if I could
> observe a
> > decent pattern without blowing myself up. I have heard that the
> injectors
> > simultaneously have 12V on them, like they are continuously
> running with
> > the engine on. How on earth does this work? It seems like you
> should
> only
> > inject before the compression stroke!!
> >
> > I have a mechanic friend who checks for leaky injectors by hooking
> up a
> > fuel pressure guage, running the engine a second and shutting
> down. If
> the
> > pressure remains without decreasing, the injectors are not
> leaking.
> > However, this wouldn't work in a Vanagon, would it? Isn't the
> other end
> of
> > the fuel rail being returned to the gas tank, so that the rail
> does not
> > stay at 40 psi without the fuel pump running? I can't imagine the
> whole
> > gas tank being pressurized because of the vent line through the
> charcoal
> > filter.
> >
> > Finally, in order to check my fuel pressure, the FLAPS guages say
> they are
> > for Ford, GM, or Chrysler fittings. Is there a way to make them
> work on
> > our Vans? Where do you hook them up and how?
> >
> > Thanks,
> > Michael Townsend
> > 90 Carat
> >
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