Rough Idle were to start

[iftekhar.frt]

So my car has been idling rough for quite some time now.

i did a boost leak test

found none after the turbos
but there is a one inch hole before the front turbo and after the maf ( My guess is because the car has been fitted with a BOV one of the opening is open) ... Point A from the picture below

Point B is were BOV is installed .. Point A and B are very close to each other .. The blue path does not exist now

now if i plug that hole with something the idle rpm stabilize at 750 rpm this makes sense because now no extra air is begin sucked through that hole and all air comes through the maf so the fueling is correct.

but now when i drive the car it feels weak. Like really slow . there is no acceleration at all . the car just struggles like a climber on a mountain .. almost no boost and the rpm cap at around 5-6K .. the rpms are slow to rise ..

seems like if i plug that hole the car gets deprived of air.

if i open that opening than the car drives fine with perfect acceleration. only the idle is bad then at around 400 rpm

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is the following link related in any way ?

https://www.clubvr4.com/forum/showth...ere-s-the-pill

Other info its a preface lift auto , BOV (VTA) installed .. no o2 sensor as it is a pre face lift.. i do have evoscan in case you guys need any thing from those logs

thanks in advance