This discussion is very interesting to me because a friend had almost exactly
the same problem on a newly restored, no corners cut, BJ7. The car is stock
except that the engine was rebuilt to BJ8 specifications including the cam &
carbs. The engine does not ping on premium fuel. We believe the compression is
under 10:1.
His car would run great when it was cold & even when warmed up, but if he
stopped for a few minutes (like at a gas station or convenience store) it
restarted fine but would run rough & buck so bad it was almost undriveable.
The water temp. was only 180 degrees & this was verified with a thermometer. I
know what this sounds like, but wait. The fuel line is in the stock location.
The carb spacers & head shield are all installed as original. The car does not
have a header. We double checked the timing, readjusted the carbs, retorqued
the head, checked the valve adjustment, checked for air leaks, electrical
wiring issues, did a compression test & a leak down test, etc. Over a period
of time we replaced (one at a time) the spark plugs, the fuel pump, the coil,
the distributor cap, ignition wires, the Pertronics, the entire distributor,
the carbs with another set of recently rebuild carbs & a different intake
manifold. None of which improved the situation. After we ran out of ideas, the
car went to a shop where it spent almost two months. The shop eventually
replaced the stock BJ8 needles with the rich BJ8 needles & the problem seems
to have improved slightly but is not gone. I will get a copy of the shops
written report & post a summary of it hear in the next few days.
Gary Hodson
--- On Sun, 11/20/11, Bob Abbott <thehealeyguy@gmail.com> wrote:
> From: Bob Abbott <thehealeyguy@gmail.com>
Subject: [Healeys] Ruff running, bucking car
To: healeys@autox.team.net
Date: Sunday, November 20, 2011, 3:26 AM
I need the group'.s help with a
problem that has me stumped. Car is a 100 -
completely restored. Not 100 miles on it. Everything new
during the
restoration.
Starts fine, runs smoothly, until it warms up. It
then begins to miss and
buck. Its worse on acceleration but you don't need to be
hard on the
throttle for it to happen. Replaced the new fuel pump with
another bran-new
one. Sent the distributor back to Jeff to have him check
his
rebuild.Checked mixture, timing,float bowl level, etc. and
all seem to be
spot on. I'm at a loss as to what to look for next. Any and
all ideas will
be followed up
Bob
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