1999 Rover Mini Cooper Sport Charging Drop

1999 LAND ROVER
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SCOOTERTOOTER7
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  • 1 POST
My Rover mini is having some problems with charging. We have replaced the battery but it's still giving us trouble. The car will start fine if the battery is fully charged but after a few runs it will only bump start. When the car is idling the voltmeter shows 13 volts and the car appears to be running fine. When driving, the volt meter can dip down as low as 10 and then back up to 13 as soon as the car is idling again. The alternator belt seems tight enough and the lights do not appear dim. The earth for the alternator also appears to be sound. Any suggestions would be most welcome.
Mar 13, 2006 at 6:55 PM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
if all connections are good it sounds like the alt is weak
Sep 12, 2006 at 8:03 AM

Suggested Repair

If all connections are good, test and replace the weak alternator.

Conversation Summary

A 1999 Rover Mini Cooper Sport with 80,000 miles starts when the battery is fully charged but later needs a bump start despite a new battery. Voltage is about 13 volts at idle but can drop to 10 volts while driving, then recover at idle. The belt, lights, and alternator ground appear normal. The expert says that if the connections are good, the alternator is weak.

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