[Vwdiesel] VE pump problem

[Andrew .Libby]

As mentioned, the most likely blockage would be the tiny screen/orifice in
the OUT bolt.  I would check that first.  I would also check to make sure
there is not an obstruction in the fuel line that returns to the tank.
There is a 'pressure regulator' at to top of the pump case by the sprocket
and #1 injector.  That could also potentially seize although I've never
seen that happen.  It may be able to be removed using an open-end 10mm
wrench depending on how it is rotated when tight.  Otherwise, a 'special
socket is required.  I made my special socket by using a dremel and
chainsaw sharpening bit to grind out 4 of the six flats in a 6-pt 10mm
socket.

On Mon, Jan 19, 2015 at 4:59 AM, Bud <budski at gmail.com> wrote:

> Sandy,
> If I remember, I sort of had the same problem one time.  When you took the
> banjo bolt out, did you inspect the little hole to see if it was clogged?
>
> I had run some filtered WVO in mine and it cleaned things out of my pump so
> good it clogged the hole and it restricted the return line.
>
> I've resealed the pump and can't think of anything internal, here's a link
> to some pics I took plus a link in the text on how to do the job, maybe a
> few pics will jog some collective memories.
>
> Do you work HF?
>
> 73 de Bud
>
> On Sun, Jan 18, 2015 at 7:13 PM, sandy cameron <scameron at storm.ca> wrote:
>
> > I can't remember if I have ever asked for help on this forum before, even
> > tho I have been here for years.
> >
> > Cutting to the chase, My trusty, but venerable 1989 1.6 TD has suddenly
> > developed a pump problem.
> >
> > On Friday, 16 Jan, I ventured north west  from Stittsville, near Ottawa,
> > to Arnprior, about 25 miles NW from here.
> >
> > The trip was uneventful (except for the arctic temperatures, What a great
> > little heater she has!) at speeds around 60 mph.
> > A couple of times I found myself creeping above that, and had to ease off
> > to avoid velocity taxes eagerly collected by our provincial government,
> > who's premier refers to us as "revenue tools".
> >
> > Arriving at destination,  I parked in a steep driveway, nose up, and
> spent
> > an hour delivering an old 2 metre ham rig, setting it up, and making a
> few
> > local contacts.
> >
> > The owner and I then headed out to a local coffee shop to celebrate. I
> > started up normally, backed down the lane into the street, and drove off.
> >
> > I quickly noticed the car was not behaving properly, it would idle
> > normally, and run a street speeds,but topped out at about 2800rpm. (no
> > tach).
> > The "top-out " felt like fuel starvation.
> >
> > I made it home at 45-50mph max, on the level and down hill, and struggled
> > up the hills at about 30mph. The "fuel starvation was consistent, and
> the
> > speed varied with the load.
> >
> > My fuel system is plumbed with clear tubing, so the diagnosis developed
> > quickly. The filters were all ok and fuel flowed freely right  out of the
> > OEM filter.  Yet, the transfer pump in the injection pump would not suck
> > fuel.
> >
> > As always, with fuel delivery issues, I rigged my specially designed "IV
> > drip" apparatus, feeding the pump directly. Even with the supply jug
> > elevated above the pump, fuel would not flow.
> >
> > I cracked the inlet banjo bolt, and fuel gushed out by gravity.
> >
> > The obstruction or defect is INSIDE THE PUMP!!
> >
> > It may be mechanical, like a spring or lever in the governor section, but
> > that would not affect the fuel flow.
> >
> > The car had behaved completely normal up to being  parked nose-up, and
> > went in to the partial fail mode as soon as it was next moved. (an hour
> > later)
> >
> > On the half-hour return journey, it behaved normally, except it could not
> > go faster than 50 mph, and drooped on hill ascents.
> >
> > It was NOT icing or Gelling, because it was thoroughly warmed up to
> normal
> > temperature. and the blockage is internal to the pump, as proved by the
> > fuel douche bag.
> >
> > How does the pump internal pressure control work? is it a bypass return,
> > spring control valve?
> >
> > What could happen in the transfer pump that would cause it to quit from
> > being parked nose-up?  Or, just being shut off for an hour and then
> > re-started?
> >
> > I have a couple of pumps here I can swap in, but I'm fishing for a
> > "simple, stupid" solution.
> >
> > James, I'm counting on you>
> >
> >
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> >
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