Paul -
Since you blew out your piston six months ago, that means your car has been
sitting for six months. I suspect that crud/rust has built up in the tank,
worked it's way through the pump / carbs and is likely starving your car for
fuel. When you start running out of power, immediately shut off the motor
and coast to the side of the road. Pop off the float chamber lids and see
if either float chamber is low on fuel. If so, then there is probably crud
plugging up that float chamber. If both are low, then you should drain and
flush the gas tank, flush and clean the fuel pump and if you have a fuel
filter in there somewhere, change it.
Alan
'52 A90
'53 BN1
'64 BJ8
On Wed, Sep 16, 2009 at 4:05 PM, Paul Leeks <Paull@glasgows.co.uk> wrote:
> Chaps
>
> I cannot seem to get the engine of my 100/6 BN4 running at all well.
> About six months ago, whilst thrashing the old thing along the motorway, I
> managed to blow a large hole in piston #5.
> This was undoubtedly caused by detonation (the timing was along way out!).
> Since then I have rebuilt the engine with new pistons and exhaust valves.
> On start up everything fired up fine first time and the engine turns over
> nice and smooth at idle.
> However, although the car will cruise nicely up to 3,000 rpm (the fastest I
> want to go whilst running in), it has no power whatsoever; coughing and
> spluttering on acceleration.
> I have checked the timing (with a strobe light) and checked and oiled the
> distributor weights, changed the points, condenser and rotor arm.
> I have also changed the coil.
> I have checked the gaps on the valves and the new spark plugs.
> I have cleaned out and reoiled the carburettors and adjusted and readjusted
> the carburettors (with colourtune) several times to no avail.
> I have cleaned and oiled the air filters (although these are currently not
> fitted).
>
> What else can I check? All suggestions will be very gratefully received
> :-)
>
> Many thanks
> Paul Leeks
> Lancashire UK
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