advice on boost problem

[xXxstylexXx]

Hi all, im after a bit of advice

When i hit boost hard the car will occasionally lose boost to around 5 - 6psi where as it is boosting 18psi a split second before then the boost wont go above 6psi constantly, yet if i turn the ignition off then back on whilst driving the boost returns within a few seconds.

Also when i hit high speeds in 5th it shuts down to 5psi again,

Any help would be appreciated, any more info needed just ask

Thankyou

 

[ibiza_c11pra]

vac hose leak, or maybe dump vale problem?

 

[dan1990]

sounds like limp mode to me have u done the n249 and n112 iirc bypasses yet??

 

[Big_daddy]

What have you done so far when we swopped the ecu over?