[Vwdiesel] VE pump problem

[Bud]

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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