David -
The symptoms you describe are indicative of not getting enough gas /
mixture too lean. If your dashpot pistons have oil and your mixture
is correct or a little rich, then it has to bei one of the following:
1) You have something blocking fuel flow through your fuel lines.
Your pump may only be pumping just enough fuel to keep the car going
at speed. Check your pump to see if it is running hot... or see if
your fuel filters are clogged. Maybe your float bowls are crudded up.
2) You have a leak in your intake manifold somewhere... this will
cause your car to run lean and cause your symptoms... check to see if
there are no loose bolts on the manifold... maybe see if you can feel
if there are air leaks around the gaskets
3) Have you replaced your air filters recently with aftermarket air
filters? Sometimes aftermarket air filters block the little holes
next to the carb throat and can cause funny running situations
4) Your timing is way retarded
5) Your spark is weak... maybe your engine isn't firmly grounded? Did
you replace the little ground wire in your distributor?
That's what I can think of offhand. Very mysterious really.
Good Luck,
Alan
'53 BN1 '64 BJ8
On 7/7/05, davidwjones <davidwjones@cox.net> wrote:
> Alan,
> Yup, when you suggested that, I thought "it has been a while since I
> checked".... But unfortunately, they were only a smidge low, and topping
> didn't help. The car has new points condenser, cap, good plugs, coil, reset
> the timing, (static).
> I've fiddled with the carbs (mix) to the point where I'm going to have to
> pull the dashpots and start over from scratch with the adjustments, it isn't
> too lean, that's for sure! Now...
> This is really annoying, I keep thinking there will be an "Ahah !! THAT's
> it !!" ...But so far, no "Ahah!"
> David W. Jones
> '62 Mk II BT7 tricarb
> Cumberland, RI USA
>
> ----- Original Message -----
> From: Blue One Hundred
> To: davidwjones
> Cc: healeys@autox.team.net
> Sent: Tuesday, July 05, 2005 9:36 PM
> Subject: Re: Breaking down under load
>
> David -
>
> These are all classic symptoms of not having enough oil in your
> dashpot pistons. Keep them topped up with oil reguarly (20 WT).
> Also, your engine is probably out of tune... possibly the mixture is
> lean... this will contribute to your problem.
>
> Easy check is to run the car with the choke on... if it accelerates
> better when you do this... the dashpot oil is likely your problem.
>
> Regards,
>
> Alan
>
> '53 BN1 '64 BJ8
>
> On 7/6/05, davidwjones <davidwjones@cox.net> wrote:
> > Hello Sports (Car) Fans,
> > Kind of got into this a bit in the "4th of July" thread....
> >
> > '62 BT7 Tricarb. --Breaking down under load. Idles ok, and will run
> > relatively well in the higher gears, though stumbles badly when the gas
> pedal
> > is mashed. Stumbling is worst for some reason under (attempted)
> acceleration
> > in 1st gear. Sometimes accompanied by a backfire through the carbs.
> >
> > Question: If I manually twist the rotor in the distributor, advancing it,
> it
> > does not exactly "snap" back to the non advanced position. However, to my
> > recollection, it never has, in many years of driving.. --Does this, and
> the
> > symptoms warrant pulling the distributor and cleaning / lubricating the
> > mechanical advance, and or replacing any internal springs?
> >
> > The car has : New cap, rotor, condenser, points, plug wires, coil, and
> plugs.
>
--
Alan
'53 BN1 '64 BJ8
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