Cooked F40 Battery

Darolls · Jul 20, 2004

Steve said:

Update:

I drove the car (with new battery) to the local auto parts store where I know the guys well. They connected a charging system diagnostic tool to the posts, had me start the car and turn on some accessories (lights and A/C) and got the following result:

BATTERY
Rated CCA=550
Open Ckt. Volts = 12.81
Good Battery

CRANKING
Cranking Volts = 10.51
Normal

CHARGING
Charging Volts = 14.12
Regulator Volts = 14.22
Diodes Good
Charging System Good

Does that confirm that my old dead battery was the cause of my problems? Or should I yank the alternator and take it to an alternator shop to have it bench tested?
Click to expand...

Drive it!

In the future, if you start experiencing problems such as the engine cranking slower, check the charge in the battery. If it's low and the car has been run regularly, check further into the charging system.

Wasco · Jul 26, 2004

atheyg said:

14s a little excessive especially with a new fully charged battery, typically you'll get around 13 when running. The real giveaway is if your battery dies you car would still run off the alternator, even if you disconnected the battery so your car shouldn't have died.

Also is the 14 at idle if so what happens when you increase revs?

Concerning the regulator they usually are built in to the alternator on modern cars, don't know for sure on a F40.
Click to expand...

I have had batteries fry so bad the plates touch and short circuit!

Conversations

Alerts

Cooked F40 Battery

Darolls F1 Veteran
BANNED

Wasco Formula Junior

Share This Page

Cooked F40 Battery

Darolls F1 Veteran BANNED

Wasco Formula Junior

Share This Page

Darolls F1 Veteran
BANNED