So I picked up this diplomat a few weeks ago and I've been trying to get her all straightened out but there is still one issue I'm having that I can't pin down. Rolling down the road maintaining a constant speed I get this light surging feeling. The car is so quiet that I can't really hear any perceptible rpm change but I can feel it. Not a lot just subtle. I can't find any vacuum leaks but I have a hunch it's ignition related. It still has the factory lean burn on it and the vacuum line...
87 Diplomat surging
