Date: Mon, 11 Jul 2016 12:44:17 +0000
Reply-To: "kenneth wilford (Van-Again)" <kenwilfy@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "kenneth wilford (Van-Again)" <kenwilfy@COMCAST.NET>
Subject: Re: What component causes the fuel pump to come on for a second
or two when I turn on the ignition to the first position (no
cranking)?
In-Reply-To: <CABDJR_HM5YYqPRWLzjcNCW3=CzgAytzeHVG1TC+FX8FoRH9v6Q@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
I have found there is a double electrical connection on the firewall that
you have to remove the air filter housing to see. This is on 85-91
Vanagons. This connection gets corroded and doesn't let enough voltage to
activate the relay. If you hit the relay box above the coil with you hand
when the key is on you will hear the pump run momentarily as it should when
you turn the key. This makes you think it is the relay but in fact it is
the electrical connection I spoke of earlier. Cut the connector out and
splice the wires together and you will be back in business.
Ken
On Mon, Jul 11, 2016, 2:54 AM Mark Drillock <modrillock@gmail.com> wrote:
> Yes,the ECU switches on a ground for the fuel pump relay whenever it thinks
> the pump should run.
>
> The ECU also switches on a ground for the ignition coil whenever it thinks
> it is time for a spark.
>
> The ECU won't do these things if it isn't powered up.
>
> Check the red wires I mentioned previously. This red wire path brings main
> battery power to the ECU. I have fixed it or helped fix it on many
> 83,84,85,86,87,88,89,90,91 Vanagons.
>
> Other things could be the cause, such as the ECU, but check the power path.
>
> I am typing on a phone, sitting in a campground in France. I can only be of
> so much help.
>
> Mark
> On Jul 11, 2016 8:40 AM, "Fuzzy :philippe" <fuzzmeister@gmail.com> wrote:
>
> > Thanks Mark.
> >
> > When I turn on the ignition switch, the left (power) relay does click on,
> > but not the right (fuel) one. And the fuel pump does not come on for a
> > second. How do you suggest I test this? Is the ECU responsible for
> causing
> > the fuel relay to click on? How do I test whether the ECU is getting
> power?
> >
> > Much appreciate the help!
> >
> >
> >
> > A bientot et avec amour,
> >
> > :Philippe
> >
> > Love Coach ~ Event Producer ~ Certified Sexological Bodyworker
> > Philippe Lewis ~ fuzzmeister@gmail.com ~ 415-505-0786
> > www.Exquisite.Love ~ www.ClubExoticaPresents.com
> > www.facebook.com/fuzzyp ~ www.facebook.com/philippesimonlewis
> >
> > “Come to the edge.' 'We can't. We're afraid.'
> > 'Come to the edge.' 'We can't. We will fall!'
> > 'Come to the edge.' And they came. And he pushed them. And they flew."
> > Guillaume Apollinaire (1880 - 1918)
> >
> > “A master in the art of living draws no sharp distinction between their
> > work and their play; their labor and their leisure; their mind and their
> > body; their education and their recreation. They hardly know which is
> > which. They simply pursue their vision of excellence through whatever
> they
> > are doing, and leave others to determine whether they are working or
> > playing. To themselves, they always appear to be doing both.” -L.P. Jacks
> >
> > On Sun, Jul 10, 2016 at 11:20 PM, Mark Drillock <modrillock@gmail.com>
> > wrote:
> >
> >> There are 2 relays in the engine relay box. Both must click on for the
> >> fuel pump to run. Your symptoms sound like the typical bad or loose
> >> connection in the main fuel injection power supply path. I have seen it
> >> many times. Usually it is at the alternator red wire but can also be at
> the
> >> starter red wire or the wiring box red wires.
> >>
> >> One of the 2 relays clicks on when the key switch has sent power to the
> >> ignition coil. This relay powers up the ECU with power from the red wire
> >> path I mentioned above. The ECU then turns on the fuel pump relay for a
> >> second.
> >>
> >> If the ECU doesn't always get power it won't always run the pump relay
> >> when it should.
> >>
> >> Mark
> >> On Jul 11, 2016 7:41 AM, "Fuzzy :philippe" <fuzzmeister@gmail.com>
> wrote:
> >>
> >> It's not currently happening and I suspect it's why my van won't start.
> >>
> >> I normally hear some relay click off around the fuse box when the fuel
> >> pump
> >> stops, but I can't figure out which relay this is.
> >>
> >> Thoughts?
> >>
> >> Philippe
> >> '87 Vanagon 2.1 Digifant
> >>
> >>
> >
>
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