I have a 97 Blazer. Recently it developed a rattle in the Cat. Converter which was driving me insane. To try to eliminate it I 'squished it' with a trolly jack, which did stop the rattle. Then it lost power dramatically when accelerating, especially uphill. It idles puuuurfectly. Then the 'Service Engine Soon' light came on, and it seemed to have a little more power. When I started it again in the morning, the light had gone out and it again had hardly any power. I could only get it to around 40 mph until the light came on again, and then it went to about 60 mph. Is this just a Catalytic Converter problem?
