Mick -
Sounds like when you sealed the tank you plugged up the pickup.
You should never see the fuel filter run dry. It should be full of fuel all
the time, with only a small bubble for air. Your car is being starved for
fuel.
You also possibly may be getting vapor lock (despite my better judgement),
try wrapping the exhaust pipes under the fuel pump with header tape... this
can make a big difference.
Alan
'53 BN1
'53 A90
'64 BJ8
On 8/15/06, Mick Vander Ploeg <mvanderploeg@nc.rr.com> wrote:
>
> Thanks to Charley, Jim, & Alan for your replies.
>
> Here's a little more info in answer to your questions & suggestions:
> Fuel pump is new
> Fuel filter is new
> Fuel lines are new (from Doug Reid at 18G)
> Distributor is okay - good springs & breaker plate moves freely
> The car does run fine when running at a constant rpm on a flat level
> surface,
> but when I give it the gas the sputtering starts. The higher the RPM, the
> worse the problem.
>
> I did have the fuel tank cleaned and sloshed with that stuff that's
> supposed
> to coat the inside & seal it from future leaks. I wonder if that
> wonderstuff
> could've clogged the pickup tube? Is it correct that I should be able to
> see
> the fuel filter run dry, or close to it, if that's the problem? Anyone
> have a
> similar experience with a pickup tube getting jammed up with the tank
> sealer?
> Could be a good excuse for a new aluminum tank.
> ----- Original Message -----
> From: Alan Seigrist Blue 100
> To: Mick Vander Ploeg
> Cc: healeys@autox.team.net
> Sent: Monday, August 14, 2006 3:26 PM
> Subject: Re: Vapor lock?
>
>
> Mick -
>
> If your car is running well at slow speeds, it shouldn't be vapor lock.
> Usually with vapor lock, the symptoms dissapear when you step on the gas,
> because as fresh cold fuel starts getting pumped through the system
> faster, it
> has less opportunity to vaporize.
>
> It sounds to me either:
>
> 1) You have a clogged fuel filter or clog in the fuel line somewhere which
> is restricting fuel flow
> 2) Your fuel pump is not pumping enough fuel (maybe it's old?)
> 3) Your fuel tank's pick up is clogged with rust or some other type of
> crud
> 4) Your mechanical advance on the carburettor is not working correctly
> (maybe the contact breaker plate is stuck in place or some of the springs
> are
> broken).
>
> Good Luck!
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8
>
>
> On 8/14/06, Mick Vander Ploeg <mvanderploeg@nc.rr.com> wrote:
> Could someone describe the symptoms of vapor lock? My '57 BN4 has had
> a
> persistent problem of sputtering when under load. Idles fine, revs
> fine,
> but
> when given the gas to go up a hill or something, it'll run extremely
> rough.
> When I say rough, I don't mean rough like when one cylinder is not
> firing,
> it's more like a very rapid sputtering.
>
> The timing's correct, the mixture's correct (per lifting the piston in
> SU
> method & plug color), valve clearance is fine, no vacuum leaks that I
> can
> find, & I've replaced the distributor cap, ignition wires, coil, plugs,
> points, rotor, & condenser. I'm out of ideas. Could it be a vacuum
> advance
> problem or does it sound like fuel?
>
> The vehicle is 100% stock other than a spin on oil filter, so it has
> the
> original "heat shield" (piece of metal) between carbs and exhaust
> manifold
> &
> has fuel pump located above exhaust pipe.
|