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Need Jump start only after 40 mile commute


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Flightline33
User

Feb 12, 2024, 1:53 PM

Post #1 of 7 (5108 views)
Need Jump start only after 40 mile commute Sign In

2017 Nissan Altima SE 2.5L 4cyl.

I can run errands and the car will start everytime. But 50% of the time it has to be jump started after a commute to work. Battery tests ok and my charger runs for less than 5 minutes before turning off at 100% charged. TIA for any suggestions


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 12, 2024, 2:18 PM

Post #2 of 7 (5082 views)
Re: Need Jump start only after 40 mile commute Sign In

You need to do the obvious.

Start out by removing and cleaning the battery cable ends
Have the battery tested first and once you have a known good battery, have the charging system tested.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Flightline33
User

Feb 12, 2024, 2:26 PM

Post #3 of 7 (5072 views)
Re: Need Jump start only after 40 mile commute Sign In

I've been fixing my own cars for 20+ years and if I hadn't done the obvious I wouldn't be posting here. I've had the battery tested twice and "its good". I've get 14.1 volts at the battery after starting. Many years ago I would have suspected the voltage regulator but those have been internal for a long time now. Do alternators still have brushes these days? Could that be the problem.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 12, 2024, 2:34 PM

Post #4 of 7 (5062 views)
Re: Need Jump start only after 40 mile commute Sign In


Quote
I've been fixing my own cars for 20+ years and if I hadn't done the obvious I wouldn't be posting here


Well, this isn't a 20 year old Nissan. Times and technology have changed.

If everything you are telling me were absolutely true you wouldn't be having this problem so I suggest you let the people with the right equipment test it.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Flightline33
User

Feb 12, 2024, 2:47 PM

Post #5 of 7 (5046 views)
Re: Need Jump start only after 40 mile commute Sign In

Hammer,first off thank you for replying. I've had more than one car in my life so can we cut out the sarcasm? I know tech has changed and I was hoping that someone better versed in these changes would be able to explain why this may be occurring.

In my experience if a car starts and runs for a one hour commute the alternator is working. But this first happened when trying to start the car immediately after parking it. And it continues to be intermittent after sitting for 8 hours and trying to get home. It starts every morning when leaving for work but it's 50/50 whether it will start when I leave to come home.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 12, 2024, 3:06 PM

Post #6 of 7 (5025 views)
Re: Need Jump start only after 40 mile commute Sign In

OK smart guy.

This car is equipped with an external battery current sensor and battery temperature sensor. The charging system is tied into the IPDM (Intelligent Power Distribution Module) and all charging decisions are made by the PCM and all communications are done through digital data lines so let me know how you resolve all this in your driveway.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Flightline33
User

Feb 12, 2024, 3:54 PM

Post #7 of 7 (4976 views)
Re: Need Jump start only after 40 mile commute Sign In

Wow! OK I came here looking for help but instead I get belittled. If anyone has any advice for me beyond what has been explained here please contact me. Thanks






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