Try installing a new valve core ( or snugging it down), your seal in the core may be bad. To check
this, pump it up( to about 100psi) and leave the pump attached for a little while. If you see
significant leakage after 5 minutes then you know it is the seal inside the chamber and not the
valve core.
Otherwise I don't think having no pressure in the negative chamber really effects the NRS suspension
design that much ( too much makes it really active). it was designed to run with no sag. The 50 psi
they recommend is almost a token pressure.
I had the opposite problem, the positive chamber was leaking into the negative chamber and the
suspension was getting progressively more active, RS did not put any lube inside the chamber so it
ruined the rubber O-ring. Which makes me think it may be your valve core.
Joe "John Crankshaw" <
[email protected]> wrote in message
news[email protected]...
> Nope. I've pushed the valve after pumping up the neg chamber. It's not holding any pressure unless
> the pump is screwed on.
>
> J
>
>
>
> Allen <
[email protected]> wrote in message
news:[email protected]...
> > "the neg pumps up fine and looks good, but loses the pressure immediately on disconnecting the
> > pump. I discovered it by going back on with the pump immediately one time."
> >
> > Is there anything indicating pressure loss other than the lower reading the second time you
> > screw the pump hose on? The negative chamber has very small volume. It loses quite a bit of that
> > volume, and therefore pressure, when you screw the hose on - the air has to fill the additional
> > volume of the hose before it hits the gauge. Maybe that's all that's happening.