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88 2.0 si alternator troubles

 
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Old 08-23-2014, 12:18 PM
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88 2.0 si alternator troubles

To start, around 2 weeks ago I was in the middle of a 20 min drive when all my electonics on the dash dimmed & my radio cut off. Next the headlights dimmed and my rev wouldnt go higher than 3500-4000. I made it home, parked & the next morning my lude fired right up. Yet halfway to work the same things happened again. Later that day it wouldnt start (assumedly lack of an alt killed the battery.)
So I replaced the alt with a rebuilt one from oreillys, got a jump start, removed the jumper cables and it ran! Yet it sounded as though my belt was squeeking & the battery light came back on. So I planned to loosen, then tighten the belt to see if that changed anything, yet before I had time(since shes my daily driver) all the previous problems started reoccurring (dimmed lights loss of power etc) but I was on the highway nowhere near home so I kept on driving knowingly draining the battery for the sake of making it to my exit.
Drove it all the way up until the power steering went out but luckily made it to a parking lot off of the highway. The most troubling part of all being that while driving off the batterys juice, (I was unable to tell my speed since the speedo stopped working) and still on the highway, I saw sparks coming from my exhaust? (The car already had major exhaust leaks due to rust damage.)

So whats the culprit?? I read somewhere that if your battery isnt fully charged it can make your alt work too hard? Help and suggestions will be very appreciated, positive & constuctive criticism is encouraged as well.
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Old 08-23-2014, 05:24 PM
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Re: 88 2.0 si alternator troubles

Most problems with lights flickering on and off are cause from bad battery connections. Mine still does it once in a while. I'll hit the brakes and all my dash lights and radio go out for a second. Clean off the posts and terminals or replace them.
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Old 08-23-2014, 07:03 PM
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Re: 88 2.0 si alternator troubles

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Originally Posted by Lespaul59 View Post
Most problems with lights flickering on and off are cause from bad battery connections. Mine still does it once in a while. I'll hit the brakes and all my dash lights and radio go out for a second. Clean off the posts and terminals or replace them.
My battery posts & terminals are both clean & corrosion free I had them cleaned when my battery was replaced a short while ago
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Old 08-23-2014, 09:00 PM
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Re: 88 2.0 si alternator troubles

Get or find someone with a voltmeter. While it's running, Put one lead on the terminal on the alt. And the other on the negative post on the battery. You should be in the 14 volt range and not 12.If it's in the 12's then it's a bad alt. If it's in the 14's then the alt is good. Otherwise you are running off battery power and that's only good till you hit the 8 or 9 volt range then everything will shut down. Sometimes old batteries don't hold a charge and go bad. A lot of people just hook up a heavy guage wire from the alt terminal straight to the positive terminal to the battery so it will charge.
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Old 08-23-2014, 10:43 PM
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Re: 88 2.0 si alternator troubles

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Originally Posted by Lespaul59 View Post
Get or find someone with a voltmeter. While it's running, Put one lead on the terminal on the alt. And the other on the negative post on the battery. You should be in the 14 volt range and not 12.If it's in the 12's then it's a bad alt. If it's in the 14's then the alt is good. Otherwise you are running off battery power and that's only good till you hit the 8 or 9 volt range then everything will shut down. Sometimes old batteries don't hold a charge and go bad. A lot of people just hook up a heavy guage wire from the alt terminal straight to the positive terminal to the battery so it will charge.
Alright would a parts store like autozone or pepboys or something have a voltmeter?
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Old 08-24-2014, 01:35 AM
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Re: 88 2.0 si alternator troubles

Of Course. Get a cheap one.You don't need a 100 dollar Fluke.
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Old 08-24-2014, 08:30 PM
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Re: 88 2.0 si alternator troubles

Check your ground wires. The one from the alternator to the valve cover. There are 3(?) in there. Search '3g ground wire upgrade' for specific locations if you have trouble seeing them.
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2.0 si, 3rd gen, alternator, alternator pulley, dead battery


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