I have to push extremely hard on my brake pedal to get my 97 nt to stop. I have done all the checks for airtightness and brake booster failure and it does not seem to be that. The failure started the other day when I was just leaving my driveway and i heard a slight pop sound come from the front wheel and ever since the my brakes have not worked correctly. I checked all brake lines, vacuum hoses, and fluid levels and none of them are malfunctioning. PLease let me know what i can do. This is really putting a damper on this week as I am putting my new forged bottom end in w/ a 25g mitsu turbo.