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I just returned home from vacation yesterday, went to start the Z, and nothing. So I ooked it up to the battery charger, let it charge and it started up. Tonight I got a repeat performance. I was wondering if ti was the battery or the alternator-if so how hard is it to install an alternator-Thanks
 

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If you're not getting any indicator lights on the dash it's a good bet that it's just the battery. Take it to a car parts place like Pepboys, Autozone or Advance and they can test the battery for free.
 

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^^werd
 

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How I test an alternator is pop off one of the battery terminals while the car is running, if it continutes to run than the alternator works. I have heard this is bad, but I do it. I would almost guarantee it is your battery since I have had the same problems. You could also have a drain on your car.
 

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I replaced the batery and the problem continues. I wa thinking of just doing the alternator, however someone mentioned a drain in the car-what is this all about?-Thanks
 

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Easier and better way to test the battery is the voltmeter. No sparks, no spikes, no drama. If the car is running and the battery terminals read 12v you have an alternator problem.

Not sure if swampman was talking about checking pontential voltage drop across the alternator output leads or at the terminals but you can check the alternater as well that way.
 

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Gotta weigh in on this one...had a similar issue.

The best way to first test a battery is first with a volt meter. Secondly you need to get a battery acid tester for 5$ at AutoZone. Measure the spec gravity of the acid and the voltage after you have charged the battery fully.

If you have had the problem more than twice in a week, you battery may be bad (lead sulfication) in addition to whatever else made it go bad (voltage reg, alt, etc.). A local shop should have a "alternator load test" tools that they can check an alternator for you to about 80A. Use the phrase "parasitic drain test" when you talk to them, and they will pull all of the fuses to check for a ciruit that has a leak.

Replacing the Z32's alternator is quite involved.

Some background info:
http://www.uuhome.de/william.darden/carfaq1.htm <- excellent article!!
http://www.mightyautoparts.com/pdf/articles/tt63.pdf

Diodes go bad in alternators (another goodie):
http://www.misterfixit.com/baddiode.htm

My problem stems from my lack of driving (30mins/week) and a smaller battery box (thought it would be easier it install). When the battery when below full charge, it bit by bit went bad.

A recent post may be interesting to you as well...

http://www.zcar.com/forums/read.php?f=3&i=299282&t=299282
 
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