Thanks for the replys, the engine doesn't seem to be misfiring, I can put a cup a tea on the rocker cover with the engine running on tick over, but when I start the engine from cold as soon as I put my foot on the accelerator pedal it nearly dies, then I hear the whistling noise, after a minute its fine but still get the whistle, I'm hoping its a vacuum pipe that's knacked.
Thanks, but what and were is vacuum advance anorl?