The alternator went on my sentra little while ago. So i went out to a junkyard and got myself one from a ga16. It fit on perfect and everything connected right back on. I went out for a drive and not even 10 miles the speedometer died. I checked the little plastic piece that goes into the tranny and it was fine. All the wires are connected fine. Now i went out for a spin yesterday and the battery, check engine, and airbag lights came on and stayed on. They turn off when i rev the car up to redline at a stop with the clutch in. Does anyone have any idea what this could be? The battery stays charged but i think it may be low as the dash lights got dim. Let me know fellaz. Thanx
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91 Sentra SE-R
turbo
Last edited by 94sentragtr : Aug 4th, 2004 at 09:33 PM.
Reason: made a mistake on word
Am not completly sure but if I hadn't known you replaced the alternator I would say you need to replace it . There is a possiblity that the junk yard part was no good.
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96 200sx with Erebuni 285 kit (GTR), 17" OZ superleggras, wilwood 4 pot 11" brakes, rear disc conversion ,lots suspension upgrades, hotshot header, stromung exhaust, CAI, UR pulley, JWT cams and ecu, racing seats, new carpet and rear seats a few other cosmetics sold car for 350Z
Sounds to me like you got junk; junk yard parts pull the altnernator and battery and go to your local parts house, they can test both either on the car or off the car.
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Thats the thing, The alternator charged up the dead battery that died out when the first alternator went. I guess ill head over to advanced auto and check it out. Any other ideas? Thanks
Thats the thing, The alternator charged up the dead battery that died out when the first alternator went. I guess ill head over to advanced auto and check it out. Any other ideas? Thanks
A couple of years ago I replaced the alternator on my 90' 240 SX (man that car could fly!). I picked up a remanufactured one at Autozone. I could only access the alternator laying underneath the car (I was quite happy when all was intact and ready to roll). Everything was fine until my car wouldn't start again after maybe 4 or 5 starts. Come to find out, you can kill an alternator if you first use it in your car with a dead battery (you've got to fully charge that battery before using a different/new alternator). Luckily, I just passed it off as a "bad remanuifactured part", took the refund, and ran! Yes, I'm bad...
Plopped in another one (this time starting the car with a fully charged battery, car part stores also charge batteries for free, takes about an hour). All was well (well, besides every other system on that wonderful car, I suppose you shouldn't 4-wheel drive these guys).
Last time I had an alternator die it did things similar to what you said. The battery light would come on at low rpms and at high rpm's it would go away. After a while it got to the point where slowly it got worse as in I had to keep from running stuff that used power. As that happened I figured something out. The light will come on when the alternator is putting out below a certain point. So basically at higher rpm's its putting out more power however the car needs more power to run at higher rpm's and the extra juice from the alt at high rpms can't add up to the extra juice the car needs to run. So basically, keeping the rpms up will keep that annoying light off but will drain your battery to the point that you have no current left. Keeping the rpms down will leave you to deal with that annoying light but will leave you with more time til there is no juice left at all.
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I wish more people thought about this. Putting a good alternator on a system with a dead battery is the same as disconnecting the negative lead on a battery, it just makes the alternator just work too damn hard and burns it up.
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