Stalls when accelerating from idle stop.

[chongtak]

Hello guys,

So I have a PCX 150 year 2014. I live in Thailand and here we have an idle stop switch on the right side handle. It's used to stop the idle when waiting at the trafic light and starts the bike as soon as we accelerate.
My problem is that when I accelerate on stopped idle, the bike stalls and I have to give a couple of accelarations to start again, the problem has started to occur a couple of years ago. I have changed the battery, the spark, the bike cold starts without problem, is riding very well.
I have noticed that when I accelerate very slowly, like turning a couple of millimetres, it does not stall and I can ride normally, but if I acelerate normally it stalls.
I suspect the Iacv to be faulty or dirty.
What is your opinion about that?

[grndslm]

Does the PCX even have an IACV? I suppose so, but many newer vehicles don't even have one...