87-300TD Not Starting - Injector Pump?

[1987-300TD]

Good Day Everyone!

I am having issues starting my 87 300TD. She cranks but does not seem to come close to catching...

* replaced the o-rings on the injector lines in November. Starts were hard before the change. She seemed to crank for at least 30-60 seconds before starting. After the change, there was little to no difference.

* brought battery to AutoZone to have it fully charged. Attempted starts had drained it to 49%.

I also recently had the engine cleaned to start troubleshooting oil leaks. It appears as though the Injector Pump is one of my culprits.

To that end, I ask ye gurus, Could my non-starting issue be because of the oil leak at the Injector Pump?

I am also questioning the filter in the tank as I have not checked that in quite some time. I am going to add 5 gallons of fuel tomorrow to see if that helps. :-)

Any advice is greatly appreciated!

Thank You all for sharing the knowledge!

g