Alternator Not Charging Until Revved

Alternator Not Charging Until Revved. Normal range is 13.3v to 15.3v (winter. If the voltage regulator in your car completely fails, then the battery can no longer be charged by the alternator and it will soon lose its charge and die.

Alternator not charging Third Generation FBody Message Boards from www.thirdgen.org

The alternator doesn't charge until you rev the engine over 4000 rpm, just once, then it's fine the whole time it's running. It's normal for an internally excited alternator to not charge at idle. Normal range is 13.3v to 15.3v (winter.

Source: www.sau.com.au

The alternator is necessary to keep the battery recharged and to alternate the electrical current throughout the many components of your vehicle to keep them powered. When this happens, there's not enough load on the alternator to turn.

Source: www.thirdgen.org

The alternator is necessary to keep the battery recharged and to alternate the electrical current throughout the many components of your vehicle to keep them powered. I've got no battery light when i turn on the ignition, and when i start the car the alternator does not charge unless i rev the engine to about 2000 rpm, where upon it continues.

The Delco Alternator (With Integral Voltage Regulator) S Designed Not To Charge Until The Rpm's Reach About 2000.

Battery before start, after a 100 mile ride. Ok, i got a working ohmmeter again. Your tired old wires and connectors have likely built up more resistance with age.

Voltage Should Climb To At Least 13.5V.

The engine control unit (ecu) is the brain of the car and makes sure everything works smoothly. Can't explain why they did that, but it's how they work. Split charge diode there will be no voltage feed on the b+ terminal which means that.

Turbobricks Forums > Mechanical > Maintenance & Nonperformance:

It's normal for an internally excited alternator to not charge at idle. Should be around 900 rpm in neutral and the idle speed is adjuste in drive to no less than 750 rpm. Diagnosing an alternator that won’t charge.

If The Voltage Regulator In Your Car Completely Fails, Then The Battery Can No Longer Be Charged By The Alternator And It Will Soon Lose Its Charge And Die.

It takes rpm for the alternator to charge the battery so if you have 11 volts. Both leads heading into the plug on the alternator are reading about 12 volts when the key is on. After that it's fine until started again.

When I Measured The Voltage, I Get ~12V When The Engine Is Off, ~9.5 When The Engine Is Running But Not Revved, ~14.4V After It Is Revved.

This means that you could have a weak alternator, or a poor connection at the battery terminals. The red wire on the back of the alt is hot and at voltage. The engine will start but the alternator.