Truck wont crank I’m stumped

[JesseT7.3]

About two weeks ago I went to start my truck and found out the hard way that I had left my lights on. Well I get jumped off, drive it all day, and it cranks fine the rest of the day. Next morning it cranks really slow and doesn’t start, and I hadn’t left any thing on. Again having to get jumped off. Same thing, all day it dose great. Next morning it starts but latter in the day I come out to start it and it turns over really slow, but I cycle it a few times to the point that it felt as if I had killed what battery it had left, but then all of a sudden it spins over really fast and starts. So I take it to Advance they tell me the battery on the driver side is bad. So I put a new battery in it. Dose fine for three days, then goes back to the slow turn but wont start. So I have the batteries tested again and the battery on the passenger side is reading 500 cca, it should be 850. So when I go back the next day to get a battery they test it again and now it reads 843. What the crap is going on? So chose not to buy a battery, and it dose great for three more days, and then this morning I get up to start it and turns over really slow and then clicks. I’m about to rip my hair out, and my wife is about to leave me. Any advice would be appreciated. If it maters it has 178k on the clock, I bought it six months ago with 160k. I have changed the fuel filter twice, Oil twice and now using Valvoline Blue. Used a lot of injecter cleaner over the past 18k. it’s a 2001 7.3 4X4 auto. Thanks Jesse

[nastea]

Originally Posted by JesseT7.3

About two weeks ago I went to start my truck and found out the hard way that I had left my lights on. Well I get jumped off, drive it all day, and it cranks fine the rest of the day. Next morning it cranks really slow and doesn’t start, and I hadn’t left any thing on. Again having to get jumped off. Same thing, all day it dose great. Next morning it starts but latter in the day I come out to start it and it turns over really slow, but I cycle it a few times to the point that it felt as if I had killed what battery it had left, but then all of a sudden it spins over really fast and starts. So I take it to Advance they tell me the battery on the driver side is bad. So I put a new battery in it. Dose fine for three days, then goes back to the slow turn but wont start. So I have the batteries tested again and the battery on the passenger side is reading 500 cca, it should be 850. So when I go back the next day to get a battery they test it again and now it reads 843. What the crap is going on? So chose not to buy a battery, and it dose great for three more days, and then this morning I get up to start it and turns over really slow and then clicks. I’m about to rip my hair out, and my wife is about to leave me. Any advice would be appreciated. If it maters it has 178k on the clock, I bought it six months ago with 160k. I have changed the fuel filter twice, Oil twice and now using Valvoline Blue. Used a lot of injecter cleaner over the past 18k. it’s a 2001 7.3 4X4 auto. Thanks Jesse

I would say your batteries are dead again....I would think your having a charging problem. I would test your alternator, you can take it in and they should be able to test it also. I just put a new one in my truck it ran 205 total with core fee.

[JesseT7.3]

They tested the alternator it is reading 14v. I thought of that too. It beats the heck out of me Thanks

[nastea]

Its obvious the batteries are likely dead again, but why they are not recharging is the question. The only other suggestion I have is to replace that other battery. I know since I've owned my truck I replaced my batteries in pairs. The the alternator light starting coming on, so I tested and it was bad so I replaced the belt along with a new alternator.

Thats all I have, next

[JesseT7.3]

Thanks for the input, I'm still not to sure what to do, Its like a shot in the dark. Thanks

[ryandamo]

i kow with the duramax at work the batteries would not hold a charge at all because they were so bad, we would have to jump it every morning and replacing both batteries solved the problem

[JesseT7.3]

Thanks, I guess I will just buy a battery and see what that dose. Do you think it has effected the brand new battery?

[nastea]

The only thing on the new battery might be the charge.

[JesseT7.3]

So if one is bad, it couldn’t kill the brand new one?

[nastea]

I would doubt it, the only thing I can think of is that the new one is drained. If it did kill it the battery should have a warrenty.