Ok, so this car usually runs on Veggie supreme. But lately two of my oil sources dried up. So I was without oil. Over the weekend I apprehended some oil and was driving the car, which continued to idle roughly. Once I switched it to oil it began to run as normal. MORE POWER, SMOOOTH IDLE, NO SMOKE... My WVO system is independent of the diesel system. So minus the diesel tank, and fuel lines the motor is running fine. So, as some have suggested it must/may be the tank strainer. So I will probably try that this weekend. I am somewhat/highly relieved!!! I will keep givning updates. Thanks for your help.

__________________
1982 300CD (Veggie)
1975 240D
1986 190D (lost a bearing)
1982 240D (dead eng.)