Turbo pressure up and down help needed

[tripper]

hi guys not been on for a while after a bit of help as you can see today my car started to lose boost pressure checked pipes and dv everything seemed ok seemed to be better when the car was cool but after about half hour losing pressure all the time one minute 12 psi then it was back up between 18-20 psi where it usually is oh and yes its mapped and everything has been fine since it was done just today this started to happen been searching all night and did some reading about the n75 valve could it be this or something else any help would be very greatful thanks.

 

[Big_daddy]

Is you car remapped?has your dv been changed?
Have you checked on vag for faults and done measure the blocks for boost duty?

 

[tripper]

yes it has been mapped and it has a forge dv fitted checked for fault codes but nothing came up but i`ve only got shareware version of vag com and sorry to say not to good with it

 

[Big_daddy]

yes it has been mapped and it has a forge dv fitted checked for fault codes but nothing came up but i`ve only got shareware version of vag com and sorry to say not to good with it

who mapped it?

 

[tripper]

performance torque been done quite a while now

 

[sportbilly]

N75 is a good place to start if its boost related. Quite a bit of info on this - bouncing boost - fluctuating boost.

 

[Big_daddy]

performance torque been done quite a while now

Yeh me also, good old Will.

i had similer issue, changed the N75 as tend to leak after period of time? do you have an upgrade air filter? when was the maf changed?

 

[Pabs]

when i had this problem it was only between 18-21psi. Something as drastic as 12-20psi seems quite bad.

check the usual, boost pipes etc, make sure none of them are loose or leaking. Check the forge DV over, see if it needs regreasing/servicing.

 

[tripper]

and what i mean about the boost is that i can floor it and the boost will go right up then i can let off and then when i floor it again it might lose about 6-8 psi it has been changing near enough every time i put my foot down

 

[tripper]

i have a pipercross induction kit fitted and the maf has never been changed i dont think checked pipe work and can`t seem to find anything wrong is there any way of testing the n75 valve as they are quite pricey aren`t they especially if its not broken

 

[Big_daddy]

i have a pipercross induction kit fitted and the maf has never been changed i dont think checked pipe work and can`t seem to find anything wrong is there any way of testing the n75 valve as they are quite pricey aren`t they especially if its not broken

well the only way to check would be vag, using blocks 115 , actual vs requested.

 

[tripper]

does it have to be a registered version to read that

 

[Big_daddy]

does it have to be a registered version to read that

Yes it needs to be fully activated. what part from birmingham you from/?

 

[tripper]

near oldbury junction 2 m5

 

[Big_daddy]

If you wanted to pop over, could get some power runs of your whole engine. Like i did.

http://www.seatcupra.net/forums/showthread.php?t=137253

so tells whats wrong good and whats holding you back. (Me FMIC )

 

[tripper]

that would be great and very kind of you when and where

 

[Big_daddy]

that would be great and very kind of you when and where

Yeh ive got free time before returning back to work (Hooliday booked).

Check you PM.

 

[tripper]

not had any message from you

 

[Big_daddy]

Click private messages on the top right hand corner. Then inbox.

 

[tripper]

still nothing came check your pm