How Long To Idle Car After Jump Start. I replaced the alternator and the car started off of a jump and even started back up on its own. Some people start their car and leave it running for 30 minutes.
Start the rescue car and the car with the dead battery. After you start your car with jumper cables the voltage regulator sees a discharged battery and commands maximum field in the rotor. Attempt to start the car with the dead battery without shutting off the fully charged car.
Good actually takes on an average 90 minutes for a cars alternator to recharge a dead battery at a higher than idle RPM.
If you check all these engine components and your car fails to start you might be able to start your vehicle with a jump starter. Be sure to drive your car for about 30 minutes before stopping again so the battery can continue to charge. But at 600 RPM the alternator can only provide about 14th of its rated output. If your car only had one gallon of gas left in it your next stop would probably be a gas station.
