Car Engine Stops at Red Light

Why Does My Car Engine Stop at Red Light?

There are a few reasons why your car engine might stop at a red light. Here are some of the most common:

Idle Air Control Valve (IACV): The IACV is responsible for regulating the idle speed of your engine. If it’s not working properly, it can cause your engine to stall when you come to a stop.
Throttle Position Sensor (TPS): The TPS tells the engine how much fuel to inject. If it’s not working properly, it can cause your engine to stall when you come to a stop.
Mass Air Flow Sensor (MAF): The MAF measures the amount of air flowing into the engine. If it’s not working properly, it can cause your engine to stall when you come to a stop.
Vacuum leaks: Vacuum leaks can cause your engine to stall when you come to a stop because they can lean out the air/fuel mixture.
Electrical problems: Electrical problems can also cause your engine to stall when you come to a stop. For example, a loose or dirty electrical connection can cause the engine to lose power.

If your car engine stops at red light, there are a few things you can do to try to fix the problem:

Check the idle air control valve: The IACV is located on the throttle body. You can clean it using a throttle body cleaner.
Check the throttle position sensor: The TPS is located on the throttle body. You can test it using a multimeter.
Check the mass air flow sensor: The MAF is located in the intake air duct. You can clean it using a MAF cleaner.
Check for vacuum leaks: You can check for vacuum leaks by spraying a mist of water around the intake manifold and hoses. If you see the water get sucked in, you have a vacuum leak.
Check for electrical problems: You can check for electrical problems by looking for loose or dirty electrical connections.