No, definitely noise suppression as previously indicated. Arc suppression
components are built in to the pump, not all cars had these blue capacitors,
which were also fitted to the coil and voltage regulator.
Switching the ignition on and off several times can free stuck points or
clean dirty ones (BT, DT) but you ignore the underlying problem at your
peril (BT, DT as well). It is not a matter of leaving the ignition on all
night (which is very bad for the coil, battery, and pump if the contacts are
stuck) but the vibration from the pump clicking back and fore as you turn
the key that 'fixes' the points, in exactly the same way that thumping the
pump body does, albeit more gently.
PaulH.
----- Original Message -----
> It limits the arcing on the contact points
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