My cars doesn't make boost sometimes. When I go for long drives or have the AC on for a while it makes half the boost .05 kpa. It will sometimes stay that way for a few days then all of the sudden... I will go back to making normal boost roughly .1 kpa. The only mods I have are a GFB blow off, an Apexi Turbo timer. It is really starting to piss me off. Subaru/Hundai in Temecula told me everything looked fine. But the car didn't have the problem when I took it in. Any ideas? please help.