What happens to the engine after replacing the battery?

After replacing the battery, the engine idles very rough and will die with the air on. My car has 225000 miles. My car has an automatic transmission. You will need to re-learn the idle for the vehicle to get it to idle high enough. You should first clean the throttle plates and throttle body and idle control valve.

Can a car battery be disconnected while the engine is running?

Battery voltage MUST be maintained to the (PCM) and other modules; while the battery is disconnected. NEVER : disconnect the car battery; while the engine is running or the ignition key is turned on. Automotive Car Battery With Negative Cable Removed

What happens when you remove cable from car battery?

Removing Cable From Car Battery So, disconnecting the car battery to reset the (PCM) on late model vehicles; can do more than just erase the keep alive memory. It can also erase vital learned information that is; absolutely necessary for other modules to function normally.

What happens to steering angle sensor after battery disconnect?

The steering angle sensor will have to undergo a relearn procedure; following the battery disconnect. Replacing the car battery on some vehicles requires entering the new; battery info into the (PCM) with a scan tool.

Why do I need to replace the battery in my car?

Replacing the car battery on some vehicles requires entering the new; battery info into the (PCM) with a scan tool. This is necessary because; the vehicle’s charging system is programmed to; gradually increase the charging rate, as the battery ages. Finally, it causes a loss of channel settings on an, electronic radio and clock.

How to disconnect a car battery to reset the computer?

Different cars will have different procedures, but with most, just driving the car will do the trick. If you use the baking soda mixture instead of cleaner, mix 1 tablespoon of baking soda into 1 cup of water. Thoroughly rinse the battery with clean water to remove all of the solution.

What to do when a new battery is installed?

Step 1 – After a new battery has been installed, the engine could idle low or stall out altogether. When this happens hold the accelerator pedal to help engine to continue to run.

What to do when your car engine stalls after a new battery?

Begin with the vehicle on level ground engine off (cold) with the emergency brake set. Step 1 – After a new battery has been installed, the engine could idle low or stall out altogether.

Can You disconnect the battery with the engine running?

Some day a well meaning mechanic or naive jump start specialist will attempt to disconnect your battery with the engine running. If you value your car and your money, don’t let him! The man from the road service thinks he’s being helpful.

What should I do if my car wont start after replacing the battery?

Warm the engine, but hold your foot on the throttle as necessary to keep the engine running. With the transmission in Park, slowly release the throttle so that the engine will idle on its own. You may have to work at this a bit. Let the engine idle on its own for about one minute.

How can I get my car to idle after replacing the battery?

With the transmission in Park, slowly release the throttle so that the engine will idle on its own. You may have to work at this a bit. Let the engine idle on its own for about one minute. Continue to let the engine idle and with your foot on the brake, place the transmission in Drive and let the engine idle for another minute.

What happens if you disconnect the battery and run the engine?

If you disconnect the battery and the car conks out, you don’t know if it conked out due to insufficient alternator current, or whether the resulting transients caused your ECU (the car’s computer, which controls fuel mixture, timing, and much more) to spit out bad data, shutting down the car. Nobody should EVER run your engine without a battery.

Can a new battery cause an engine to stall?

Step 2 – Sometime a high idle condition can occur after a new battery has been installed, this is the opposite of the engine stalling but share the same malfunction, the computer is unable to control idle speed. Simply drive the vehicle for a short time for the idle to subside to normal operation.

What happens to the engine after replacing the battery?