Had this issue that had been getting gradually worse over the year I've owned the car where on gentle acceleration the car would waft along fine picking up speed, but try to boot it and it would get near 4K and just stutter a bit, last week getting so bad that I couldn't even get near 4K or the car would stutter, cough and back fire..
Simple fix (should have done ages ago) was a new rotor arm and Dizzy cap, the rotor arm had a split long the brown coating on the arm, blackened from use and the dizzys metal contacts were slightly miss shapen and corroded from use.
Popped the new one on and it feels like a new car, did the HT leads for good measure.
I'm sure a lot of you will shout 'STANDARD SERVICE YOU PLANK' but this is for anyone else who might be having he issue (few guys on the FB groups were scratching their heads at the problem also).
Cheers
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