been on rolling road today after remap and uprated acutator everything was going fine until 4500 revs then a little cough then the boost went from holding 18 psi to gradually dropping below 10 and staying there just wondered if it cud be the boost soleinoid or map sensor annoying to say the least

 

help ha

 

can you not disconnect the boost control valve and use a bleed valve to stabilize the boost?

 

staying away from bleed valves haha just wondered what the problem was

 

ive only just got myself a FRS but im pretty sure that the AF map has a flat spot at 4500rpm.