Ok. I spent a few weeks troubleshooting a vibration issue. Felt like low rpm miss. I had vibration and sound at certain rpms. Turns out I chased a number of items. First, I replaced all the ignition parts and it was much better, but not gone. Second, I found my timevalve exhaust had a loose baffle- fixed but not gone. Last I decided to get under the car and look for something loose. The pic is what I found !! After removal of course.
What I'd like to post is that my issue was a combination of issues but in the end the seeming "miss" or vibration was the flex disk imploding. For those searching the boards, when this vibration goes away under super light, no load throttle, then returns with a slight load- check your flex disk. Being new to the w113's I wouldn't have know this but once replaced, along with the other minor improvements, man oh man is that one smooth running, sweet sounding little motor. Thank you all as always for your input to help me solve this. New full member Rob