Good info Dan about the fuel filter.  They are so easy to replace.  Anyone know of a recommended change interval for those?  I just guess...so I do about every 25K.  I have a new tank, store my van in garage with mostly full tank, so water vapor condensation is nil.  I don't drive dusty roads very much; but I do sometimes.  Gas is from local neighborhood gas station, one of those "Top Tier" ones, I assume it's pretty good stuff.
For Jamie, the bogging of motor (especially at high elevations and high ambient temperatures and running uphill) is a classic case of clogged fuel tank outlet and/or clogged fuel filter.  Dennis H. embedded this in my mind!!  The giveaway signal is a noisy fuel pump that crummy cavitation (bubbles) is happening; fuel injectors do not like bubbles.  Neither does the fuel pump.

Rich
San Diego

    On Sunday, November 29, 2020, 2:35:20 PM PST, Dan N <dn92610@gmail.com> wrote:  
 
 how old is your fuel filter? it could be it...
I had the very same symptom as if the brakes were dragging, running lean
etc etc... - I replaced the fuel filter and the symptom was gone, better
idle and the power is back...

On Sun, Nov 29, 2020 at 1:25 PM Jamie Auch <jamie@kookymathteacher.com>
wrote:

> Hello list,
> I have been lurking for sometime and need your wisdom. I was having issues
> with my 1989 Blue Star before I parked it a year ago. It would run well but
> when it got warm I lose power like the fuel was cut off. I have decided to
> get it going again. I have tested the fuel pressure and read 36 psi with
> the vacuum line to the plenum disconnected. When I attach the vacuum to the
> regulator, the engine cuts off. Any ideas as what is happening? Thanks in
> advance.
>
> -Jamie Auch
>
> Sent from Mail for Windows 10
>