I installed my JWT POP with the BLitz stainless filter on it the other day. I never noticed this problem before I did that. When I floor it to get onto the highway, or to pass. It sounds like it is slipping. In 4th and 5th, sometimes it will rev up, drop 500 rpms, then climb again like normal. Also, I have a CEL on that has been on for a couple of weeks. I haven't had it check yet, but could it be something else? Also, when I shift gears, the clutch grinds a touch when pressing the pedal in. My '95 never did this. Any suggestions?