battery?

[punkrockford]

Bad alternator or starter is drawing too much current during engine cranking. I would have both bench tested. Leaning toward failing alternator

 

[Corb@CorbinShipping]

batteries seem to be healthy but the alternator doesnt. all vehicles should be above 13.5v while at idle. healthy it should be above 14v

live life full throttle

Awesome.... No codes thrown either. Both batteries are doing fine. Ill be getting these tested in a few hours...

 

[superstroked]

Corb,

Mine is doing the same thing(fail to autostart after sitting) but will start. It looks like I have one battery that is on the way out. When first starting It only charges at about 13v for the first few minutes then, bumps up the 14+ on the dashdaq. I have been putting off batteries for a while now but, will break down soon. My build date is in 07 sometime

 

[Corb@CorbinShipping]

Corb,

Mine is doing the same thing(fail to autostart after sitting) but will start. It looks like I have one battery that is on the way out. When first starting It only charges at about 13v for the first few minutes then, bumps up the 14+ on the dashdaq. I have been putting off batteries for a while now but, will break down soon. My build date is in 07 sometime

I was just about to post the same thing...build date 07/09... After running about 10 min, now 14.03..... I'll test each bat separately in a bit...


Drivers side bat had fair amount of corrosion... Cleaned with wire wheel...

 

[lincolnlocker]

corrosion creates problems too.

live life full throttle

 

[Corb@CorbinShipping]

What is the CCA suppose to be? We load tested it at 675 and it made 332 each .... LOL I'll be getting 2 in the morning....

 

[superstroked]

What is the CCA suppose to be? We load tested it at 675 and it made 332 each .... LOL I'll be getting 2 in the morning....

uhmmmm...should be more

 

[Corb@CorbinShipping]

uhmmmm...should be more

I think so too... LOL

 

[Corb@CorbinShipping]

For future reference... Checking voltage on the dashdaq, is not how to gauge battery power... Disconnecting each battery and load testing each one individually, gives better feedback.... LOL

 

[superstroked]

For future reference... Checking voltage on the dashdaq, is not how to gauge battery power... Disconnecting each battery and load testing each one individually, gives better feedback.... LOL

It does show that your alternator is working properly though!

 

[Dzchey21]

It does show that your alternator is working properly though!

Right that was my main thing, there is no real good way to actually check the batteries other than isolating them and load testing them, you can check voltage after they have sat over night and that might tell you if one has an issue over the other but even then load testing the battery is the best way

 

[Corb@CorbinShipping]

Well ***..... New batteries, as soon as I fired it, it clicked on me again.... Second try fired right up. Not getting over 14 V... Idling over 13, running at 13.67... 12.6 when I shut it down.

Alternator is doing fine, or so it would seem... But the starter seems to have some kind of issue. Maybe a loose wire, or a slightly jacked up ground... More to follow...

 

[tbsimmons]

I am putting money on a ground. If you painted any parts, check to make sure the paint is not in the way of a ground.

 

[lincolnlocker]

check all grounds and connections at both ends. make sure those are not lose or dirty/corroded. batteries are gonna be above 12 volts as long as the alternator is producing more than 12v.. if all connections are good, clean, and tight, the alternator is prolly bad from keeping bad batteries charged. should still be above 14v at idle.

live life full throttle

 

[lincolnlocker]

what did you come up with corb?

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[Corb@CorbinShipping]

what did you come up with corb?

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Still working on it..... Also changing tunes on the SCT is a total PITA... I could not change between tunes, without throwing codes like crazy. But, one issue at a time... Ill be under the truck in the morning, and up at Rudy's thursday afternoon until we figure it out...

 

[qcfarmer]

Does it turn over slower than it used to? I'm guessing starter is weak. You probably won't realize it until you put a new starter on it and crank it for the first time. It will crank faster than you remember it ever cranking.

 

[Corb@CorbinShipping]

Does it turn over slower than it used to? I'm guessing starter is weak. You probably won't realize it until you put a new starter on it and crank it for the first time. It will crank faster than you remember it ever cranking.

It doesn't seem to turn slow. But, like you said, won't realize it till you see a new one crank. I am still less that 14 V when running, sometimes. But, all of the sudden, I'll be at 14.15 V.... I'm still leaning toward a bad ground... We will see in a bit...

 

[superstroked]

I got new Motorcraft 750cca batteries yesterday and hot ham what a difference this morning! I am going to stick the other two on a slow charge for a few days and then return the one that fails a load test and use the other on my golf cart.

 

[lincolnlocker]

It doesn't seem to turn slow. But, like you said, won't realize it till you see a new one crank. I am still less that 14 V when running, sometimes. But, all of the sudden, I'll be at 14.15 V.... I'm still leaning toward a bad ground... We will see in a bit...

that or voltage regulator is going out in the alternator.

live life full throttle