Lumpy idle, cuts out on PAS at low speed

[Cuplica]

My friends 182 has a really lumpy idle. It cuts out when power steering is used at low speed turns, like the effort of the pas makes it cut out. What could be the problem? On normal speed runs its OK.

 

[Dan@SJM]

Timing usually

 

[clioben182]

Pas pressure switch?