I recently purchased a 1968 ford 5000 diesel non runner. Story is it ran fine when parked for the winter but wouldn't start the following spring (this year). PO tried either and claimed to have put other stuff (unknown) down the intake, still wouldn't start and he could get fuel thru the filters to the injection pump but no fuel out of the pump. Tractor turns over fine just wont start. I have since then got fuel to squirt out at the injectors by priming the pump. tractor now has whitish colored smoke come out the exhaust when cranking but still doesn't fire off. I'm not a big fan of either but I did give a couple of quick squirts and still nothing. I checked the timing by putting NO.1 TDC flywheel mark on 0. the injector drive gear and cam drive gear dots line up. turned the flywheel to 19 degrees and the injector timing marks line up. seams it should start, am I missing a something? I am new to this forum, any help and advise greatly appreciated.