Another belt issue, I just replace my drive belt about one week ago. On that day its look nice and quit( i thought i resolve the prob), on the next morning when I start the bull OMG the noise come back and it was terrible this time :angry: . After 10 min of driving the noise is gone (just when idle) but when I accelerate :werd: the belt noise again. I check and clean completely all the pulley before I install the new belt, I got the belt from motocraft dealer and they give me (dayco belt) which same belt as the old one. this noise drive me crazy… this morning I spray WD40(belt test) same as the old one noise is gone after I spray, but not when I accelerate it. please advice what should I do now?! Thanks much.