datsun 1/2 dozen SD Posted December 27, 2007 Share Posted December 27, 2007 please if anyone could help me i hate electrical stuff so iam not really good at it.. anywase i got a problem my battery keeps on over charging so every time i drive my z battery acid keeps on coming out i switched out the alternator twice had my voltage regulator check out everything was ok there i doo use an ignition box a stock mopar ignition works very well dont know if thats the problem because my brother uses the same system and he doesnt have this problem i already went trough three batterys please if any one could help i would appreciate it thank you Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted December 27, 2007 Share Posted December 27, 2007 Wow, thats one helava sentence.... Please try some punctuation, you may get a response that way. Quote Link to comment Share on other sites More sharing options...
V8ZRACER260Z Posted December 27, 2007 Share Posted December 27, 2007 Your voltage regulator is malfunctioning or the sensed wire for the regulator is hooked up incorrectly. Put a voltmeter at the battery and it should read 11.5-12.5 volts this is standing voltage. Now start the car and at idle you should not see much diference. However increase the rpms to about 1500-200rpm and your voltage should rise to 12-14.5 volts depending on your battery condition. Idealy you should have a completely charged battery for this test (Charge it over night on a seperate battery charger if needed). Under no circumstances should the voltage go past 14.5-15.0 volts if it does you have a defective regulator or the sensing circuit is reading the wrong voltage. Most of the guys run a gm style 1 wire alternator for simplicty. This alternator is self exciting and self regulating and cheap! You can try testing and if needed replace your voltage regulator. My recomendation would be to go with a GM 1 wire set up and be done with it. Quote Link to comment Share on other sites More sharing options...
datsun 1/2 dozen SD Posted December 28, 2007 Author Share Posted December 28, 2007 Your voltage regulator is malfunctioning or the sensed wire for the regulator is hooked up incorrectly. Put a voltmeter at the battery and it should read 11.5-12.5 volts this is standing voltage. Now start the car and at idle you should not see much diference. However increase the rpms to about 1500-200rpm and your voltage should rise to 12-14.5 volts depending on your battery condition. Idealy you should have a completely charged battery for this test (Charge it over night on a seperate battery charger if needed). Under no circumstances should the voltage go past 14.5-15.0 volts if it does you have a defective regulator or the sensing circuit is reading the wrong voltage. Most of the guys run a gm style 1 wire alternator for simplicty. This alternator is self exciting and self regulating and cheap! You can try testing and if needed replace your voltage regulator. My recomendation would be to go with a GM 1 wire set up and be done with it. thank i will try gm conversion. one question though what about the zx internal regulated alternator do those work just as well? Quote Link to comment Share on other sites More sharing options...
V8ZRACER260Z Posted December 28, 2007 Share Posted December 28, 2007 They should I'm not familiar with that set up though. If you can get a wiring schematic for the year in question that should help. Quote Link to comment Share on other sites More sharing options...
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