<VV> fuel pump pressure?

Daniel Monasterio González dmonasterio at hotmail.com
Mon May 6 10:34:44 EDT 2013

The spring produces the fuel pressure, after the plunger is released by
the cam on the crankshaft. Output pressure/volume on the (mechanical) pump
could be affected (lowered) by the diaphragm condition (soft or hard) and
the sealing of the button valves.
So, if button valves are good and diaphragm has the right softness,
pressure can be varied thru the spring force.

Daniel Monasterio

On 06/05/13 08:28, "N2VZD at aol.com" <N2VZD at aol.com> wrote:

>wondering if the spring has that much to do with actual pressure?
>I would think those button valves do more for pressure?
>I have put several replacement covers on ( chrome or correct AC ) with no
>known change in pressure
>I have a test gauge made by putting a tee with small fuel pressure  gauge
>on a left fuel line.
>regards, Tim Colson
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