![]() ![]() If it still doesn’t turn off, there could be a problem with your car key or even the alarm. If it doesn’t, try to lock and then unlock your car to try again. Your anti-theft alarm system should have a key symbol on your dashboard that should turn off a few seconds after starting the car. But if you have the right car keys, the anti-theft system should switch off after turning the ignition key to the on position.īut when it doesn’t turn off, the alarm may be triggered or show it’s active on your dashboard. Anti-Theft Alarm System IssueĪn anti-theft system, when active, won’t send any power to the fuel pump. They’ll use the smoke test where a mechanic pumps smoke into the intake system to find the exact source of the leak. However, the leaks aren’t always apparent, and you will need a mechanic to help. You can pop the car’s hood to access the engine bay and check for a ripped or disconnected vacuum line. Now, your car can run with a minor vacuum leak, but if it’s severe, the air fuel ratio will become too lean, causing an engine stall. Your engine runs lean if the fuel in your car’s ignition chamber is igniting with too much air or too little fuel. This leak allows unmetered air (air that flows not via the mass airflow) into the engine, messing up the expected air fuel ratio and causes the vehicle to run lean. When there’s a hole in a vehicle’s air intake system behind the mass airflow sensor or MAF sensor, it’s called a vacuum leak. In such cases, it’s best to let a mechanic handle it. If it doesn’t help, chances are there’s an electrical issue inside the valve preventing it from proper functioning. You can clean the idle air control valve and check if it stops the car from dying. If the idle air control valve fails, your car’s idle may not be the smoothest, or the vehicle may stall completely. The IAC also manages engine load changes when your car isn’t moving, like when you turn on the AC, headlights, or radio. It’s connected to the throttle body - part of the air intake system controlling the air flowing into the engine(in response to your gas pedal input). When your car is idle, the idle air control valve (IAC) regulates the air-fuel mixture. Here are 12 common concerns you should look into: 1. While you can do it on your own, it’s best to let a mechanic handle it if you’re unfamiliar with the ins and outs of a car. If your car starts then dies, the only way to fix it is to first find out the cause.
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