I have a 1992 Buick, Roadmaster Limited with 56,000 miles. Under load at about 1400-1600 rpm a severe pinging sound immediately precedes a considerable amount of rattle. I use only premium gasoline, have adjusted the timing to 0 degrees BTDC, installed a new knock sensor, and a knock sensor control module. I use OEM parts ie. The spark plugs are AC Delco. The PCM returns no codes, but the noise is extremely disconcerting. I am afraid there is a problem in the valve train. Please, can anyone either confirm or dispell my suspicions? Thank you.
Tuesday, July 11th, 2006 AT 9:02 PM