Just purchased an 81 300SD Turbo Diesel
The engine idles with extreme vibration. as soon as you touch the pedal to bring it to about 900 RPM it smoothes right out.
It dosent seem to be missing at idle, just really vibrating.
the guy i got it from said it idled smooth before he parked it 2 years ago.... so who knows if thats a lie or not..
motor mounts maybe?
I changed the primaryfuel, main fuel, oil, and air filters today - didnt help at all.
I wound up just raising the idle a bit so the car is more driveable
any thoughts are greatly appreciated!