New mustang owner... Big time DIY'er. At start up, engine runs fine, nice power. After about 15 - 20 minutes of normal driving, major power loss can be felt 2k rpm+. Also, only when this happens, you hear a sound very similar to a fan blowing high (haven't had the chance to find out what the sound is). Assuming it could be the fuel filter, but what's with the sound? Would hate to have a mechanic charge $100 for a $20 job.