Had to remove battery, recharge. Still doing same thing?

2001 CADILLAC DEVILLE

146,500 MILES • V8 • FWD • AUTOMATIC

MDLERT

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In Jan. bought a new battery because car was acting as though it didn't want to start. Autozone checked and said new battery. 3 wks. later went back because car was doing same thing. Had to remove battery, recharge. Still doing same thing. Yesterday while slowing down and making a turn into parking lot car died. Also, after start up in a.m. and driving 3 blocks, slowing down for stop sign car dies. Had a new alternator put in approx. 3-4 yrs. ago. Twice, since new battery, been stopped in a parking lot, let foof off brake and car will excellerate to 25-30miles/hour like it is stuck. Could my fuel line be the cause of both problems?

Mar 3, 2010 at 12:07 PM

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

The stalling issue that you are having does sound like due a weak alternator.
It will be good idea to get the alternator tested. It might not be producing enough power to the battery.
The alternator should produce 13.6V to 15.2V, to the battery with the engine running.
Here is a helpful video of how to test the alternator:

https://youtu.be/Z-p4dMJUpUw

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Keep in mind that if a faulty alternator can make the battery go bad as well. As the battery is not designed to be draining and recharged over and over.

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.

Images (Click to enlarge)

Sep 23, 2021 at 8:57 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.