Heat & My ur-q don't mix

[Jeff & Staci Hemmerlin <hemmsta@sc.llu.edu>]

We recently had a warm spell here in Southern Cal.  The temp probably got
up to about 90-95.  I was returning from the Drive up Angeles Crest Highway
with the local chapter of the Q-Club.  I his traffic and was moving at 5
mph for about 45 min.  After being in traffic for a little while the car
would not idle on its own.  I had heel and toe just to keep it running.  I
have since installed a manual switch for the injector cooling fan and
insulated the fuel lines running to and from the control pressure
regulator.  The problem still occurs even if I run the injector cooling fan
anytime I am below 20 mph.  The A/C was on until the car started running
rough.  When I turned it off it did not help.  The temp gauge was not
reading hot.  When the traffic cleared I had NO power.  The 0-60 time was
about 2 min.  I could barely keep it at 60.  After driving in the slow lane
for about 15 min hoping that I would not have to be towed.  The engine
suddenly surged a few times and then all 160 hp was returned like nothing
was wrong.  

Any suggestions?

Would reduced voltage do something like that to the computer?
Am I experiencing vapor lock. (where)
Does the control pressure reg (fuel boiler) need to be attached to the
block or can it be located in a cooler environment?