Is it good to turn off AC before turning off car?
Is it good to turn off AC before turning off car?
In short, no, you do not have to turn your air conditioning off before turning off your vehicle. That being said, it never hurts to disable electrical systems, including the fan, before switching off the ignition.
How does the engine shut off when the engine is turned off?
Engines equipped with an electronic fuel shutoff solenoid have an extra valve that shuts off the fuel system immediately when the ignition is stopped. These models should be turned OFF with the engine at FULL throttle.
Can a car fan still run after the engine is turned off?
Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.
Why does my alternator run when I Turn Off the car?
Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.
Why does my car run when the ignition is turned off?
With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem. If it does not stop running, your feedback problem is coming from something other that the alternator.
What makes a car stop running when the ignition switch is turned off?
A diode only allows the flow of current in one direction. The diode will prevent current from going back to the ignition switch and this will prevent a “run on” condition when the ignition switch is turned off. Use a Radio Shack #1N4001 diode or an equivalent value
Why does my engine keep running after I Turn Off the engine?
EGR Valve Problems Another common cause for engine overheating is a stuck-closed EGR valve or carbon buildup interfering with valve operation. The Exhaust Gas Recirculation (EGR) valve is designed to introduce exhaust gases back into the combustion chambers to lower engine temperatures and, thus, harmful emissions.
Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.
Why does my hot rod engine not turn off?
Since this is so intermittent my suggestion may not apply, but not turning off can be from an electric fan back feeding the ignition or from a alternator that need a diode in the line to prevent back feed to the ignition system I have had both give me problem. On my 327 with an electric fan the engine seems to run on till the fan comes to an stop.
