The problem went away at first for about 2 months. But later it came back. Finally figured out it was the Spider Injection assembly, and the fuel I was fillin up with. Ran about 4 cans of BG44k through it, and replaced the injector's. After that she drove great and got better MPG's. The catalytic converter was fine. Intake manafold gaskets were fine. It all came down to a clogged fuel system and a couple clogged injectors.