crazy 7.3 no start

[2000pstrokeblue]

ok here goes i had another tread goin but need to get this fixed soon. 2000 f250 7.3 4x4 for several weeks i had a slow cranking problem would almost kill the batteries but would always fire up. I tested the batteries and they were good, replaced battery connections a week ago. I then replaced the starter and heres where my problem starts. It crank at a good speed but would not start. killed the batteries. So i placed it on a charger overnight and plugged the block it( been around 40 degrees here). next morning went out and it fired up drove it around and started it a few times with no problems. let it sit for about 8 hrs and it fired up again. then today i went out and no start again cold, was not plugged in. So i checked the GPR and glow plugs with a multimeter and all checked out good. when i key it up i hear a buzzing from under the dash and when cranking. it was coming from under the radio and i read that it could be the fuel pump relay.. so i drained the bowl and it fills so im guessing thats not it. checked the grounds and they seem good as well.. tried unplugging the CPR as well.. running out of ideas.. will plug block in tonight and see if it starts tomorrow

[jesilvas]

How'd you test the batteries? What are the CCAs?
How long did the GPR stay energized?
The buzzing is a relay, possibly fuel. But buzzing means low voltage usually.

[2000pstrokeblue]

with a load tester separately.. i believe i had 850 cca and the other was a little over 900, id say the GPR stays energized for almost 2 mins

[jesilvas]

Ok so that's all good.
To check the fuel pump, you can pull the fuel filter and then turn the key on. The bowl, from empty, should fill up fairly quickly.

[2000pstrokeblue]

the bowl fills fine..

[2000pstrokeblue]

ok so plugged in over night and started... but now i have a leak from the drain tube coming from fuel bowl when i opened it apparently it didn't seal back up. do theese typically seal back up? i put some lucas injector cleaner in bowl and exercised the valve a couple times and now its just a drip

[jesilvas]

Probably just need new orings in it.

[2000pstrokeblue]

just to end the story.. even tho the grounds and battery terminal connections looked good and were recently done i cleaned and dialectic greased every ground i could find and poof problems seems fixed been starting fine for 2 days... i swear its always the the connections and grounds..lol thanks for the help