Battery Dying After A Few Days

CHIODI · January 9th, 2012, 12:00 AM

hi so i checked the alternator like you said and its weak. it charges at 12v with lights on and heater on. i also noticed the previous owner put a underdrive pulley on the crank. i would never use an underdrive pulley so im gonna install the new alternator and put a stock pulley on.

CHIODI · January 9th, 2012, 12:01 AM

im gonna kick myself if this was the problem the whole time. i went crazy chasing this dead battery problem. thanks!

fogged306 · January 9th, 2012, 10:39 AM

If you're gonna get a new alternator, do a 3G alt conversion. Much better alternator. The ones in these cars were barely enough to keep up the the current needs of the car anyway.

CHIODI · January 9th, 2012, 11:32 AM

Hi I actually already ordered and received a 130amp by paperformance. Still need the crank and a longer belt? Hey if its not too much troubke can you have a look at my cooling fan question i posted? Thanks

fogged306 · January 9th, 2012, 04:56 PM

I would ditch the underdrive personally so yea different pulley and belt.

I saw your other thread but I got nothing for you. I have a flex a lite but mine has 5 pins so the wiring won't be the same. Ryanw covered what I would have told you. Other than looking over it carefully for a model number and then googling that to see what you come up with.

January 9th, 2012, 12:00 AM	#21
CHIODI Regular 1987 notch Join Date: Feb 2010 Location: New York Posts: 321 iTrader: 0 reviews	hi so i checked the alternator like you said and its weak. it charges at 12v with lights on and heater on. i also noticed the previous owner put a underdrive pulley on the crank. i would never use an underdrive pulley so im gonna install the new alternator and put a stock pulley on. __________________ 1987 5.0 Notch

January 9th, 2012, 12:01 AM	#22
CHIODI Regular 1987 notch Join Date: Feb 2010 Location: New York Posts: 321 iTrader: 0 reviews	im gonna kick myself if this was the problem the whole time. i went crazy chasing this dead battery problem. thanks! __________________ 1987 5.0 Notch

January 9th, 2012, 11:32 AM	#24
CHIODI Regular 1987 notch Join Date: Feb 2010 Location: New York Posts: 321 iTrader: 0 reviews	Hi I actually already ordered and received a 130amp by paperformance. Still need the crank and a longer belt? Hey if its not too much troubke can you have a look at my cooling fan question i posted? Thanks __________________ 1987 5.0 Notch

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January 9th, 2012, 10:39 AM	#23
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	If you're gonna get a new alternator, do a 3G alt conversion. Much better alternator. The ones in these cars were barely enough to keep up the the current needs of the car anyway.

January 9th, 2012, 04:56 PM	#25
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	I would ditch the underdrive personally so yea different pulley and belt. I saw your other thread but I got nothing for you. I have a flex a lite but mine has 5 pins so the wiring won't be the same. Ryanw covered what I would have told you. Other than looking over it carefully for a model number and then googling that to see what you come up with.

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