LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

95 Z won't start unless jumped

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Old Sep 12, 2012 | 09:19 AM
  #1  
Chet1185's Avatar
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95 Z won't start unless jumped

95 z28, battery holds 12V plus and the starter has 12v+ but the solenoid isnt getting the power. I cant get an accurate reading but im pretty sure i saw only like 3 volts. what could be causing this. could the wires be corroded and im not seeing it? how do you test the ignition switch?

car will start after a minute of jumping from another car and will start after the battery has charged a while but it is always holding over 12Volts, its like the little extra power starts it. brand new starter, bench tested before install. battery was bought in july.

Last edited by Chet1185; Sep 12, 2012 at 09:29 AM.
Old Sep 12, 2012 | 10:28 AM
  #2  
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Re: 95 Z won't start unless jumped

Sounds like the battery. Have it load tested. Just because it shows 12v, doesn't mean it has the power to start the car. It should actually have 12.6v when fully charged.
Old Sep 12, 2012 | 10:51 AM
  #3  
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Re: 95 Z won't start unless jumped

x2, take the battery up to your local auto parts store and have them load test it.
Old Sep 12, 2012 | 10:59 AM
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Re: 95 Z won't start unless jumped

Has the alterntor been tested? Might not be keeping battery charged.
Old Sep 12, 2012 | 11:01 AM
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Re: 95 Z won't start unless jumped

alternator is working good. just went out and battery has been sitting for an hour and it has 12.8 volts and it fired right up. i will keep checking and then if its the same i will have it tested.
Old Sep 12, 2012 | 11:03 AM
  #6  
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Re: 95 Z won't start unless jumped

I would check your connections, then.
Old Sep 12, 2012 | 11:24 AM
  #7  
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Re: 95 Z won't start unless jumped

Took every connection off and wire brushed it already. Could the wire be corroded inside the rubber?
Old Sep 12, 2012 | 12:31 PM
  #8  
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Re: 95 Z won't start unless jumped

Battery cables easy and cheap. Might be a good idea anyways if you suspect them. Doubt it would be that if you cleaned both ends good. Starters can bench test good and be bad.
Old Sep 13, 2012 | 09:44 AM
  #9  
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Re: 95 Z won't start unless jumped

would pulling the injector fuses and measuring the volts while cranking be the same as a load test? if so i only have between 6-8 volts. the battery was boughten in july but im sure it could be bad, right?
Old Sep 13, 2012 | 10:35 AM
  #10  
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Re: 95 Z won't start unless jumped

Originally Posted by Chet1185
would pulling the injector fuses and measuring the volts while cranking be the same as a load test? if so i only have between 6-8 volts. the battery was boughten in july but im sure it could be bad, right?
No, it takes special equipment to do a load test. Just take the battery in and have it done.
Old Sep 14, 2012 | 01:11 PM
  #11  
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Re: 95 Z won't start unless jumped

Battery was bad, suppose to be 700 ca but only putting out 114cca
Old Sep 14, 2012 | 04:44 PM
  #12  
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Re: 95 Z won't start unless jumped

I would still test the alternator since your battery is so new and already bad. Something must be happening to ruin it that fast. Free easy test at auto parts stores.
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