Truck wont start.

[cjc4167]

Hi guys, well I'm reading through the post trying to see if anyone has the same issue im having.

About 3 weeks ago I got called out to work jumped in the truck (05 F-250 6.0) wouldnt start. thought I didnt give it time for fuel pump and burned the batts down. threw a 6 amp charger to it and left, came back 4 hrs later, shut charger down started right up. 3 days later went to DMV 10 miles away spent maybe 20 mins inside, came out turn over fine but no start. burned batts down. 3 hrs later got a jump from a wrecker started up fine. seen pass batt was red, went to autozone shut it down, replaced pass batt no start. had them check both batts it showed fine but was reading from the new batt so i changed out the driver side old batt and it started up fine went home. about a week later same thing wouldnt start again. threw 6 amps to the batt and she started right up within a min of being on the charger. then a few days later go to start her up and she turns over then sluggish to start and runs fine. then this morning wife had to run to the school no start at 1030 i come home at 3 and another sluggish start and ran fine.

Anyone have any clues?
Thanks
Chris

05 F-250 6.0 (76,000 miles)

[HVAC SuperTech]

are you getting a SES light? if so, any codes?

Check fuel filter/change if dirty.
Check your alternator with a DC voltage meter, or have Autozone check it. seems like your batteries are draining from something.

Check with a meter for continuity between the positive battery cables and frame, intercooler ends, radiator, ect. it might be contacting and you need to wrap it with electical tape or replace one.

[cjc4167]

ill check it once she cools down. I went to start her this morning and she rolled over fine but no start. I put my new charger to it (75 amps) and she fired of. that was 0545 this morning. I left work at 1500 and it started up fine.

What could be drawing the batts down?

Thanks

[HVAC SuperTech]

check for continuity with a meter(or ohm it out) between the positive batt cable and the frame, block, radiator, intercooler. if nothing there, then you have to see whats drawing amperage as it sits. I think that involves something with a test light and pulling fuses. Maybe someone on here can re-iterate what I mean.

[cjc4167]

Im gonna get a meter when i get to work.

[cjc4167]

ok i checked it with a meter in a few places with my father inlaw. i got .5 going to the radiator. he jumped in held the throttle to the floor turned it over and slowly started up. ??????

Thanks for helpin me!!!!!

[HVAC SuperTech]

there ya go. tape that bad boy up really well, and you should be good to go!!

[cjc4167]

Now why will it start holding the it to the floor? Then once it starts it will run fine for a day or so. Is it just gets charged up from running then slowly runs down when sittin? Do you happen to know where the wire are at?

Thanks for the help!!