Ever since I took my jeep wheeling last weekend, it hasn't been getting very good brake pressure and I hear a blowing sound from the brake pedal that is noticable louder than it was before I started loosing brake pressure. What do you guys think is wrong. The brakelines were recently changed and bleed correctly, the reservoir is also full of brakefluid still. I have a 97 with 4.0 and AW4 and no ABS if that helps.