cup dies at 6k

[Y100LAD]

ive got a 52 plate cup and when it gets warm it just looses all power and cuts out hen refuses to start unless you disconect the crank sensor..... i had a brand new crank sensor fitted last week...... any ideas

 

[mini-valver]

If you disconnect the crank sensor, the car wont run at all!

Does it run ok when cold then just miss fire and cut out when it warms up?