Had this problem a while back but it cleared ok. When im slowing down through the box, if i leave the clutch in too long the revs should hold at tickover revs but they dont, they drop right down and the car cuts out, as soon as i let the clutch out again if its in gear it restarts as if its being bump started.
Any clues???

Ta

 

maf sensor ?

 

Maf sensor is fine mate

 

Have you checked for air leaks on pipework etc:
Clean out the idle control valve?

 

Once you've saved it from stalling, does it idle OK, or does it hunt? Or do you need to keep revving it to prevent it from stalling...?

 

Once it has restarted its fine, only does it in 3rd 4th and 5th aswell, not had it doing it in first