Ok, I don't know if this will end up being a long post but I'm going to try to provide as much info as possible. My car is BPU and I use the AVCR and the Greddy BCC. During summer time, I had no problem holding whatever boost I wanted and I usually ran 1.2 bar. When the weather got really cold I could no longer boost above 1.0 bar. Anything more and the car would cut out. It isn't like a fuel cut out, it is more rapid kinda like a machine gun rapid cut in and out. I changed spark plugs and gapped them to .32 and nothing changed. I checked the voltage on the BCC and it was fine. We just had some 65 degree weather so I thought I would see if anything changed and it didn't. I need help, I'm seriously missing having big power and I can't race anyone.