Battery not charging high RPM
Hi All. When I am on the highway at high speed the voltage gauge keeps bouncing low every few minutes. If I cruise at a lower speed it stays steady. Also if I punch it to pass someone the lights will dim way down and the battery icon will light up and I get a message "battery not charging". When the rpms come back down all is normal again. Anyone have this experience? Thanks
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Vehicle
so... is this the impala? Tahoe? Ram? year/make/model would help :)
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Sorry, 2003 Suburban.
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First make sure the belt is tite. Even if it's a serpentine, the idler may not be as stout as it was when new. Second get the alternator tested. Most auto parts stores will do that free.
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Absolutely correct. Check the belt and tensioner. The belt may be slipping and that will cause the low voltage on hard acceleration.
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Thanks. I changed out both belts, idlers, and alternator last year. I'm gonna try another alternator.
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Put in a new alternator, problem solved.
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