i have an 87 mustang gt that just developed a loud squeaking noise under the hood. at first i thought it was the belt tensioner so i replaced the pulley but the noise didn't stop so then ireplaced the arm to but to no avail. It starts squeaking when you slow down to come to a stop and when youre sitting at idle but as soon as you give it some gas the noise stops, but when the rpms start to come back down the noise begins again. for some reason it sounds like maybe a rocker isnt getting enough oil until you get on the gas. What could cause this problem? My buddy said it sounded like maybe the bearings have went out. What bearings would i need to replace if thats the case? Please Help!!!!