Stalls after acceleration when dropping to idle

[dom14]

Have you gone over
the above list?
Mine has started
to backfire on start up
but intermittently.
Intermittent faults are
the worst!!!!!
I replaced the leads
and fixed a lot of
problems a few
months ago.

RB30 carby can be pretty weather sensitive when it's on dual fuel.
I had been having misfiring and occasional backfiring.
I basically put in a second dizzy which I opened up and cleaned before I put it in.
No backfiring or misfiring now, but it idles pretty low when cold(about 400ish) on LPG.
Petrol idling is slightly higher(about 650ish).
I think the problem is in the carby idle circuit.
I haven't bothered to tune the carby yet, 'cos the problem isn't urgent.
Open up the dizzy and give it a good clean and lube the mechanical parts.
I would also try advancing the timing a little bit as well.
RB30 Patrol dizzy is electronic, but there're vacuum advance & mechanical(centrifugal I think) advance, which are both mechanical. They need lubing and service after a long time use.

In mine, ignition lead no-2 was showing 5200 ohm resistance, which was fair bit higher than the rest(twice as much).
But, I still haven't replaced the leads.

As for the OPs issue, I think it's the carby, according to my similar experiences.
Having said that, it's worth checking the fuel filter, gauz filter and fuel pressure, before opening up the carby and trying to tune it.