Charging system

THOMAS GUITAR

MEMBER
2002 ACURA MDX
3.5L
V6
4WD
AUTOMATIC
275,000 MILES

I have had the charging system tested and once I bring the RPM's up to about 2,000 the voltage output from the alternator drops drastically. On three occasions now when I go to accelerate on the road the car either has shut off or the battery light along with the brake like comes on. Any ideas?

Tuesday, October 15th, 2019 AT 10:17 AM

4 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Have you had the alternator replaced? It sounds like it might have a bad internal voltage regulator. Hope this helps and thanks for using 2CarPros.

Danny-

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Tuesday, October 15th, 2019 AT 1:25 PM

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Have you had the alternator replaced? It sounds like it might have a bad internal voltage regulator. Hope this helps and thanks for using 2CarPros.

Danny-

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Tuesday, October 15th, 2019 AT 11:40 PM

THOMAS GUITAR

MEMBER
2 POSTS

Hi Danny,

Yes, last night I pulled the alternator and took it to both AutoZone and NAPA and both passed it on bench test. So, I replaced the battery and right away as soon as I accelerate the battery light comes on still. Has not shut off yet with the new battery but given the light has come on three times randomly during acceleration I am spinning wondering what it could be. Any advise would be much appreciated.

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Wednesday, October 16th, 2019 AT 7:57 AM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Have you inspected the battery cables? Check the connections for looseness/frayed/dirty/corrosion type problems. Have you used a professional type scanner to view live data on the charging system? Hope this helps and thanks again for using 2CarPros.

Danny-

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Thursday, October 17th, 2019 AT 6:07 PM