I'm new to the forums and hope that someone can help me out with a problem. I own a 99 GS-R, and am getting some strange missfiring problems. After I drive my car for about 10 minutes I get this strange lag in acceleration. I changed the spark plugs and fuel filter, but the problem still persists. I checked the compression in the cylinders and that is at 120 and only needs to be at 100, so thats fine as well. If anyone could give me any help I would appreciate it.