My wifes 87 Diesel when you come to a stop at a light shakes pretty good, however while it's doing it if you put it in Neutral or Drive, it stops. I've got 2 threories, either the motor mounts are shot (liquid filled correct?) or I've got maybe a plugged injector or some sort of injector problem? She uses REDLINE 85 plus religiously. I just would like to narrow down my problem before I talk to my local shop so I can be prepared.
Any input would be really great and appreciated. Thanks in advance!