He's getting the battery light on the dash when the engine speed is below 4000 RPM, but it goes away above 4k. Can an alternator die in a way that it will provide a charge when spun fast enough, but not at lower speeds? Or should he be troubleshooting connections? Thanks in advance!

 

its the alternator. that happend on my 87 DX a while back. it is a warning. Replace it asap if it is daily driven.

 

Same thing happened on my '85 DX CRX...I was able to make the 1 hour drive home before my Optima battery died due to the alternator suddenly deciding that it was going to die. Replace the alternator ASAP...

 

Yes Scott it can

U headed to BeaveRun this thursday?

~Ricky Shank
85 CRX SI

 

I wasn't lucky enough. Me, my GF, my little sister and 2 cousins were driving on the Bay Bridge and the alt. decided to take a crap on me. it was night time and the lights decided to go real dim. It was one of the worstest rain in no. cal that winter. i almost got rear ended by a big rig.

 

They are 100% correct. On my 87 Civic hatchcrap, the car would die if RPMs went below a certain amount. So I upgraded the alternator and went with an Optima Yellow Top Ran like a champ every day after!!

 

great guys, thanks alot! it's his beater, so i'm sure it'll get a beater alternator