1.4 170 hp tct boost problem

[ashkan619]

Hi dear friends
Im from Iran and I have a 1.4 multi air giulietta 170hp tct

1. I have a problem with my car but nobody in my city can't understand the problem
When I press the paddle to acceleration, boost goes until you last section but after 4 rpm , 2 or 3 section decrease and then again full boost and again decrease 2 or 3 section,
Can u help me to solve the problem?
.
2.
I installed handmade downpipe and remap stg1 ( To primarily be compatible with gasoline, then to improve performance cause we our feul octane usually less then 95)
I installed a k&n air filter but some car mechanic told me thats harmful to the car and i removed it.
I installed that instead of original air filter and put it in the same place.
.
I would be very grateful if you could help me

 

[J.Kay]

welcome!
I don't know the answer, but discussions in English are welcome.

 

[VURT]

Potrebbe attivarsi il limitatore di giri. Se così fosse, è normale

 

[bigbilly95]

Quando la pressione del turbo si abbassa è la vavola di sfiato del turbo che apre per evitare danni, quindi c'è qualcosa che hai montato che non va bene. Metti tutto originale.