Jay
That does seem bizarre. I'll have to ponder on that one for awhile.
You maybe on the right track with the float it does seem like fuel problem
I do suggest you check the timing and the timing advance curve, also make
sure the vacuum advance canister will hold vacuum. Make sure the initial
timing is always returning to the same point. Make sure all the wire
connections to and from the distributor are good. I worked on one car that
had all kinds of bizarre problems until I found the distributor advance was
hanging up and messing up the initial timing every time the throttle was
touched.
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of Jay Laifman
Sent: Thursday, June 20, 2013 12:52 AM
To: tigers@autox.team.net Den
Subject: [Tigers] Bizarre Running Issue
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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