Ok, this one doesn't strike a chord with me from hearing similar stuff
before.
As before, I recently rebuilt the Holley. I had an issue with no running
below 2,000 rpm. I raised the front float level, adjusted the idle screws and
the idle and all was good. I went on a number of drives and it seemed fine.
But today, when driving to work, it still ran fine, until about 45 minutes
into the drive - long after the temp gauge was already reading normal
operating temp. Then it would die when I came to idle.
I looked on line and it suggested a vacuum leak or the float was too high.
But no vacuum line is remotely loose and I would think this would show its
head earlier in the drive.
Then on the way home, I hit terrible terrible traffic. It was mostly idle for
a long time, then inch forward. But, still the car was fine. It held temp
just fine, and idle. Then some time about 45-60 minutes into this 2 hour
drive, it started stalling again if I went down to idle. And now the engine
ran a bit rough below 2,000 rpm. Not bad like before I adjusted the float.
But not good either.
At every stop, even the last stop before my house, it would stall unless I was
able to catch it and lightly rev the engine to keep it going. Note that it
would stall EVEN IF I didn't hit the brakes or slow down. It was not
servo/braking/change of angle/fuel sloshing related. I could be driving along
and press in the clutch, lift my foot off the gas, and it would drop to 0 rpm
and stall.
Then I got home, pulled up to the house, and fully expected it to stall again.
Now it didn't stall and it seemed to be smooth again.
My thought was that there is something wrong with that front float. Like
perhaps something causes it to expand and it is sticking, or some other
bizarre thing. But that doesn't fully explain the behavior. Because the
front float didn't match the rear one, and it is adjusting oddly (because it
has to be lifted quite a bit off of horizontal to run right), I think I'm
going to order the newer float and install it and see what happens.
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