Hello...

I lost boost and i'm now wondering why and trying to figure out the reason.

After I got a tune, my car was running up to 20psi and holding with no problem. But now i'm only getting 10-12psi max. My car was tuned 4 months ago. no CEL


These are the possible reasons that I am considering:

Outside Temp
Since the car was tuned in the summer time, and its now winter, I am wondering if the outside temperature has anything to do with it.

Diverter valve spring
I am running the stock diverter valve. I am wondering if the spring got worn out. I don't know if the stock spring has a max psi limit.

Boost leak
I am wondering if its just a minor boost leak.


Mods:
Catless downpipe
CA intake
Oil Catch can

 

would definitely check the diverter valve first, its not to bad to take off and inspect...updated stock part is redesigned about 70bux iirc
no upgraded intercooler?