Can FAULTY n75 cause this

[bigjode]

Perhaps I should stop worrying then.

Is it true that you get less PSI in cold weather because the air is denser and therefore more "efficient" wth pressure?

I ask because my 22psi was seen in the height of summer. I can't remember actually checking the guage since then

 

[Big_daddy]

OK, cleaned up the N249, totally removed unused hoses to remove any possibilty of leaks in unwanted pipage

It now feels much better to drive! But boost is the same figure max 18psi. I repeat though it pulled very well through the gears.

Also, that weird "tsh tsh tsh tsh" dump noise has gone, now its just the usual tshhhh!

I changed the N75 for another and it still drove just as well but still didn't exceed 18psi boost.

I think I can rule out MAF becuase MAF flow looks healthy and it drives well.

I can hear what sounds like a small blow in the exhaust - can this cause a boost leak if its pre cat?

Am i just being paranoid? I'm nclined to give up ripping the car to bits just because the numbers seem off, but I can recall a time I could peak boost to 22psi

what method did you use to clean it? i want give mines spring clean

 

[bigjode]

I mean I removed all of the hoses and bits