CHARGING

[BILL S]

i have a `93 vert, underdive pulleys,eletric fan an 140amp alt. at idle lights are dime an shows about 8 to 10 volts. help!

 

[DMAN302]

sounds like the alt may be the issue..I'd pull it and get it tested, next look at the wiring to see if anything is fried or worn/broken. The alt should show 13-14 volts at idle with few or no accessories running to make me happy.

 

[jrichker]

What does it indicate at 1000 RPM? The stock gauge isn't the best, you should use a digital voltmeter to do the checking. If you are putting out 14 volts at 1000 RPM, the pulleys may be the problem, or your battery is weak.

 

[HISSIN50]

Agreed. FWIW, a car has trouble not stalling at the voltage values noted (if that was battery voltage).

 

[8950HO]

Try a smaller pulley on the alternator at least the size of a 2g pulley,since you have underdrive pulleys.

 

[BILL S]

battery is old, but starts the car fine. all lights are good at 1200rpm. going to try new battery an cables. thanks!

 

[jrichker]

battery is old, but starts the car fine. all lights are good at 1200rpm. going to try new battery an cables. thanks!

Five minutes spent with a digital voltmeter to test the alt output or have the auto parts test your charging system is a bettter use of your time & money. Don't throw parts at a problem in hope of fixing it. You'll just get poorer and more discouraged.

 

[bill302]

Five minutes spent with a digital voltmeter to test the alt output or have the auto parts test your charging system is a bettter use of your time & money. Don't throw parts at a problem in hope of fixing it. You'll just get poorer and more discouraged.

experience and wisdom = lol.

 

[BILL S]

your right, i will check it out first.