I am going to do a diesel purge on my '87 300sdl this weekend. Should I do it before I change the fuel filters or after? I am thinking before so I do not trash the new filters.
I am getting a little engine shake after I let off the accelerator at stops and I think (hope) it may be a dirty injector. Acceleration is fine, mileage is ok 25-30mpg. I have not done a purge since I bought the car over a year ago. If it is not a dirty injector any suggetions?