car is a boosted gsr 7psi for about 10k now. sometimes when i'm on the highway or accelerating a bit hard 40mph + i get this funny smell like the car took a shit. i cruise at constant speed and it goes away. again when i try to accelerate at high speeds the smell comes back. i'm a smoker and if i can smell this when i'm smoking, it must be bad. this only happens at high speeds. i did a compression test a while back and got 160psi across, the smell just happen recently. any thought?