Ok so I have been trying to figure this car out.
I found out today that when you start it up cold, and pull the plug out of the Frequency Valve that it runs alot nicer and smooths out and does blow a bunch of black smoke on Accel. But once it gets around 80*C it won't idle with Frequency Valve unplugged??

__________________
Cary
Albuquerque
1967 200 Diesel Fintails Rule!