Engine details- A15. Bought it fully rebuit and never run. Apparently has a cam. E15 elec dizzy(all new ign parts). Has approx 130miles(not thousand, just 130) on the motor.

So what its doing. Occasionally the car will die in the ass. Only occasionally tho. What it does is start running like #### and trying to stall under 3000rpm. Also makes a kind of cracking noise thru the exhaust... not really a backfire though. Then it just gets worse and worse all over the RPM range so i pull over and it will die. I try to keep it alive by just feathering the throttle. You can hear the carby sucking but it just dies. Then when i try to start it it starts backfiring thru the carby! Ive tried moving the timing to no avail. Then after leaving it for a few mins it will be driveable again(still running like ####) then clear and run beautiful! It have only really driven the car 3 times and its done it 2ce. usualy about 5mins into the drive. First with a standard carby, then today with a 32/36.
Or it will try to do it(try to die under 3k) after i do a bit of a burnout(not sit brake or anything, just drop the clutch)... but then clear.




Any ideas guys and gals?

I might dig around and try to make a standard dizzy back up and try it.