Start up problem
09-17-2006, 11:19 AM
#1
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Start up problem
Hey Guys, my 90' GT won't hold a charge. I normally have to start up my car every 3-4 days. If I don't, the car won't start. Last night I charged it overnight for about 10 hours. This morning I took the charger off and the car started right up.The charge meter in the car read 13-14 volts, as it always does. Let it run for about an hour, then turned it off. Went to start up again, and it would not start. Is the problem the battery, alternator or something else? 
Thanks!
Thanks!
09-17-2006, 11:41 AM
#2
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Chris............the volt meter in the car is not reliable; get yourself a digital volt meter. Measure batt voltage engine off; should be +12v. Start engine and perform the same test; should read +14v.
It does sound as if the battery is done but this basic test shall ensure the charging system is ok.
It does sound as if the battery is done but this basic test shall ensure the charging system is ok.
09-17-2006, 01:32 PM
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Chris? Does your GT have the original White factory battery? Or do you have records of replacement?
09-17-2006, 02:07 PM
#6
If this has been a long standing issue...
You might have the dreaded alt/regulator necrosis problem (not charging).
And of course there is always the parasitic drain in the system issue.
Before you spend abunch of bucks -other than a digital ohm-meter trickle charge that puppy again.
Clean the batt. ground strap -both side with a green pad, the surface that the strap touches -under the the wing nut- make sure that bellville washer is still there (curved flat washer). Then go for a ride. Afterwards, shut down and disconnect the ground strap again.
If she starts the next day, disconnect after shutdown again. If the batt is holding a charge while doing this more than likely its parasitic consumption which you can research and remedy -spin the fuses, clean all fuse contacts, clean chassis/coil/alt/starter grounds. check all interior lights for burnt wiring ,or cross wired receptacles, shoot the bastard that wired the new stereo to your alarm etc.
Still, regulator death seems to be at the top of the list percentage wise for batt. drain after charging, followed by bad grounds, dead shorts(lights), then age of the battery.
If it is the batt. get a gel, they are smaller and may require some form of 928 engineering to remedy isolation and securing issues. BUT they are very tough battery's.
You might have the dreaded alt/regulator necrosis problem (not charging).
And of course there is always the parasitic drain in the system issue.
Before you spend abunch of bucks -other than a digital ohm-meter trickle charge that puppy again.
Clean the batt. ground strap -both side with a green pad, the surface that the strap touches -under the the wing nut- make sure that bellville washer is still there (curved flat washer). Then go for a ride. Afterwards, shut down and disconnect the ground strap again.
If she starts the next day, disconnect after shutdown again. If the batt is holding a charge while doing this more than likely its parasitic consumption which you can research and remedy -spin the fuses, clean all fuse contacts, clean chassis/coil/alt/starter grounds. check all interior lights for burnt wiring ,or cross wired receptacles, shoot the bastard that wired the new stereo to your alarm etc.
Still, regulator death seems to be at the top of the list percentage wise for batt. drain after charging, followed by bad grounds, dead shorts(lights), then age of the battery.
If it is the batt. get a gel, they are smaller and may require some form of 928 engineering to remedy isolation and securing issues. BUT they are very tough battery's.
