Hi all.
Here is my problem
Only making 8psi boost
The story goes........
Bugeye GDA, 3inch xforce stainless cat back, standard dump pipe, rear catalytic converter removed, still has dump pipe catalytic converter fitted, stainless steel catless up pipe, perrin silicon turbo inlet pipe, KN panel filter, snorkus mod.

2 weeks ago i fitted the catless up pipe and perrin turbo inlet pipe, put everything back together and drove ok, 13/14 psi of boost. I havent driven it hard as i know it needs a tune, 99% of the time trying to aviod making any boost. I have only been driving the 15 min to work and back each day while i save for the verso tune.

Then the other day i got in and when taking off i noticed it only made about 8psi of boost. Still making the same vaccum. I have been all over the engine bay looking for intake and exhaust leaks but havent found any. I have also checked all of the vaccum lines to make sure none are split.

Any ideas as to what could be causing this. I am not sure if the ECU will be causing this as a result of different EGT and O2 readings.
Cheers