Rick. Ya, my comment was a little arcane and at best a clue for search
terms in the archive. From what I recall, if the tach needle drops during a
sudden power loss or engine cut out, that needle drop could indicate that
the fault is electrically related. Re: "automatic transmission". Just some
WAG'ing on my part but with an automatic transmission Vanagon, when
coasting in Drive, does tach normally drop a little? Or, if engine cuts out
due to an electrical fault, how does tach behave?

Re: gas cap. If excess vacuum is being created at the fuel tank, this might
cause the pump to be quite noisy and engine to stall. BTDT on a hot day in
Truly The Middle Of Nowhere Oregon.  ;)

If air can pass through the small vacuum connection nipple on the fuel
pressure regulator (blow gently), the regulator has failed. (broken
diaphragm)

Neil.

On Sun, Mar 4, 2018 at 6:44 PM, Rick Cooper <rickdcooper@gmail.com> wrote:

> You may be right Dan that both pressure regulators are faulty; I'll know
> once I get a reliable pressure guage.
>
> Neil, the '87 is an automatic (while the '86 parts van is manual).  But
> I'm not sure what you're gettting at in your first paragraph.  I'll try
> your gas cap suggestion, though I'll be surprised if the system is that
> air-tight.  I rapped the fuel pump to try to dislodge potential debris, but
> I'll redo that again with compressed air (I don't think you can run these
> things backward can you?).  It's worth redoing for sure, since it was one
> of the first things I did now a few weeks ago.
>
> Rick
>
>

--
Neil n

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