seems like a b1tch of a problem, i hate that!
the only thing i can put it down to is global warming.

maybe check for air in one of your lines or I know you went through alot of cleaning but injector cleaner could clean out the dodgy fuel you ran earlier. Your alternator is charging well?

yep righto I shall try some injector cleaner in the tank, I have a 770 cold crank amp and 105 amp hour dual cycle battery in the boot and it is chargine well off of the stock alternator, I charged it right up before I installed the set up and it has a small visual indicator that lets me know if it is fully charged, low charged or completely flat.
I had an idea today that I should drive the car till it is warm then take it to a quiet piece of straight road and accelerate to the point where the engine starts missing then quickly turn the engine off and put the car in neautral and come to a stop. Then I will check the fuel level in the bowl, if it is empty then it is running out of fuel and i will need either a new pump or the filter could be blocked ( unusual since it is only a few weeks old)

Did you get your engine sorted?

yeah mate I think I was having problems with the spark plug gap being set at .044"
I put new plugs in that were set at .033" and some injsctor cleaner in the tank and i replaced the fuel filter and it has been as good as gold since. I think I will try some irridium plugs gapped at .044" to see how they stand up and i will test out a pair of 155 main jets too just incase it is leaning out at about 7000-8000rpm
edit when I took the old fuel filter off of the fuel line from the tank, some bubbles esacaped for a few seconds before fuel began trickling out so I might have had a problem with air capitating in the pump causing the problem by running out of fuel intermittently in the fuel bowl

IT'S BAAAAAAAACK!
That damn problem is back again actually it is always there unless I change plugs all the time.
I have fitted an electric fuel pump, new cap and rotor to the datrats bluebird series 2 dizzy, new NGKBP6ES-11, at which point it ran perfectly but this week it's crap, major crap wont rev past 4000rpm, checking wiring to the coil, distributor for any cracks or shorts and no noticable faults.
Any body have any suggestions before I switch back to stock dizzy and coil and throw this (suspected) piece of crap in the bin?

hey i own a A15 myself and have had the same problem where i couldn't get it past 5000rpm, and this is when i fisrt got it so i thought A15's went to 5 grand. but got it tuned by a mate so it's sweet now, but a quick question is what is the redline for A15, mines out of a sunny! any way good luck.
cheers jason

just a rock into a pond, but check your timing.....

I had my timing a little bit too retarded... and I had allmost the same, where it would be fine with a new set of plugs.... 20 minuted worth of driving and it would be as if the plugs are shot.... new set in, and it's good again... for 20 minutes or so..... etc etc.....

eventually I came to the conclusion that it was the timing..... fixed that and now I'm sitting with about 4 set's of spanking new plugs.....

put a fuel pressure guage on the main fuel line and take it for a drive at the revs and speed it is dying. it is a simple test and can rule out a few things . do you use a standard fuel pump.dont let anyone tell you a standard fuel pump wont work on twin carbs. i run methanol on my a15 and use standard fuel pump.you need to find out is it running out of fuel or an ignition break down.

brand new electic pump 3 psi.
definately not fuel issue