cupra 20vt prbolem

[orha12]

hi,
my cupra have some problem in the last couple days.
5th gear, full throtle, and its start to play like this:
up to 1.5 bar - down to 1.3 bar
and up to 1.5 bar - down to 1.3 bar
and again up to 1.5 bar - down to 1.3 bar

what it should be?
only in about 180 KMH the boost start to be stable.
and another thing, the car feels more heavy.

please help me.

the setup is:
unitronic stage 2
walbro 255 fuel pump (NEW)
intake hose
full exhaust system
forge 007 DV

 

[wenman]

The most common cause of this is the N75 valve
Get yourself a new one and it should sort the problem.

 

[orha12]

are you sure?

 

[cupra.al]

The most common cause of this is the N75 valve
Get yourself a new one and it should sort the problem.

that was my first thought as well.

 

[orha12]

thanks it was that. the cable was off.

 

[orha12]

well, i think my N75 is dead. i will buy a new one. thanks for the help!

 

[orha12]

please help!
it's not the N75.
what it could be?

 

[maundy26]

is the turbo a vnt turbo the vains stick on them causing this. all temp sensors ok?

 

[orha12]

i think it's the wastegate.
what do you say?

 

[cupra.al]

is the turbo a vnt turbo the vains stick on them causing this. all temp sensors ok?

no because this is a 20vt not a diesel.
has the dv been serviced lately?

 

[orha12]

Yes. Please help me guys.

 

[cupra.al]

have you tried the standard bosch dv on your car just to make sure its not the dv making the problem assuming you have been having the trouble since it was serviced.

 

[orha12]

in fact i didn't tried that.
i will update tommorow thanks!