i have a 1985 Canadian bj70 with a 3b. one day this past winter it would not start and it being my third vehicle i thought i would just wait till spring to get it running (very cold where i live). so went out today to try and start it, charged batteries, then cracked the primer pump nipple and gave a couple pumps and about a cup of terrible black fuel came out? kept pumping and returned to good fuel color, then changed the fuel filter. went to drain water separator but only clean fuel came out(i think). then pumped the primer pump again until consistent clean fuel flowed. tried to start and it cranks but not even trying to start. seems like its not getting fuel, any ideas? thanks, im new to diesels