Misses, coughs, blows a lot of smoke black and blue, if you push the pedal hard it will play up if you slowly push the pedal down once it gets past 2000rpm power is back and will rev out.

Once the vehicle is warm doesn't play up, power good, no smoke goes well.

If you let it sit and cool down same happens again

Have removed all vacuum control valves and tested, all OK.

Smoke tested the vacuum system no leaks