PLEASE HELP... dont want my baby to die!!!!!
J30... high miles. just started a serious knocking noise in the engine and has always been very reliable as far as engine performance. i did not put in the wrong gas and have filled up w/ premium for sure. it started a day or two after accidentally filling engine up w/ half a quart too much of oil (may be cause but wont stop).... but drained oil to proper level and still knocks badly. valves maybe? any help will be appreciated!