Hi
I just changed the engine and trans mounts on my 1985 300td. Now when I start it (starts right up)- it idles smoothly but after a few minutes begins to miss on one or more cylinders and starts shaking. I then changed out both fuel filters and bled the system. This didn't improve anything. The clear pre-filter has an air bubble in it but the air doesn't seem to be going anywhere.

All ideas welcome.

Joseph