Engine cuts down at idle speeds

[ripp]

A friend of mine has an 182 FF, 45 k on the clock and for some 6k miles the engine cuts down at idle speed.
He changed the injectors, throttle body, lambda sensor, but the renault garage did not managed to fix this issue. the car is driving normally but the idle is unstable and occasionally cuts down (he said it only happened about 5 times since the problem started but anyway it's really annoying as you can imagine).
It seems like the ECU is gone or... what else?
Thanks!

 

[interflare]

Mine did a similar thing for a while, gave it a service and some new spark plugs and that did the trick for me.