If your car’s engine only runs with key in start position, it can be a frustrating and potentially dangerous issue. Not only can it drain the battery, but it can also cause wear and tear on the starter and other electrical components. In this article, we’ll explore some of the most common causes of this issue and provide tips on how to fix it.
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Why Does Engine Only Runs with Key in Start Position
There are several reasons why the engine might only run with the key in the start position:
Ignition Switch
The ignition switch is responsible for sending power to the starter and other electrical components when the key is turned. If the ignition switch is faulty, it may not send power to the engine once the key is released from the start position.
Starter Motor
The starter motor is responsible for cranking the engine and getting it started. If the starter motor is faulty, it may not be able to keep the engine running once the key is released from the start position.
Fuel Pump
The fuel pump is responsible for supplying fuel to the engine. If the fuel pump is faulty, it may not be able to provide the engine with enough fuel to keep it running once the key is released from the start position.
Battery
The battery is responsible for providing power to the starter and other electrical components. If the battery is weak or faulty, it may not be able to provide enough power to keep the engine running once the key is released from the start position.
How to Fix an Engine that Only Runs with the Key in the Start Position
Now that you know some of the most common causes of an engine only runs with key in start position, let’s look at some tips on how to fix it:
Check the Ignition Switch
If the ignition switch is faulty, it will need to be replaced. You can test the ignition switch by using a multimeter to check for continuity between the different terminals.
Check the Starter Motor
If the starter motor is faulty, it will need to be replaced. You can test the starter motor by using a multimeter to check for continuity between the different terminals.
Check the Fuel Pump
If the fuel pump is faulty, it will need to be replaced. You can test the fuel pump by using a fuel pressure gauge to check the pressure of the fuel system.
Check the Battery
If the battery is weak or faulty, it may need to be replaced. You can test the battery by using a battery tester to check the voltage and amperage.
Check the Wiring
Faulty or damaged wiring can also cause an engine to only run with the key in the start position. Check the wiring for any damage or loose connections and repair as necessary.
Check the Alternator
The alternator is responsible for recharging the battery and providing power to the electrical system. If the alternator is faulty, it may not be able to provide enough power to keep the engine running. You can test the alternator by using a multimeter to check the voltage output.
Here is another guide about unlocking Camaro without a Key.
Frequently Asked Questions
Q: Can I still drive my car if the engine only runs with key in start position?
A: It’s not recommended, as this can cause further damage to your vehicle and potentially be dangerous while driving.
Q: How can I tell if the ignition switch is faulty?
A: You can test the ignition switch using a multimeter to check for continuity between the different terminals.
Q: Can a weak battery cause the engine to only run with the key in the start position?
A: Yes, a weak or faulty battery may not be able to provide enough power to keep the engine running once the key is released from the start position.
Q: How often should I check my ignition switch and wiring for issues?
A: It’s a good idea to have ignition switch and wiring inspected regularly as part of routine vehicle maintenance.
Q: Can a bad alternator cause the engine to only run with the key in the start position?
A: It’s possible, as a bad alternator can cause the battery to not charge properly, leading to a weak battery.
Q: Is it safe to attempt to fix the issue myself?
A: If you have the knowledge and experience to diagnose and fix the issue, it can be safe. However, if you’re not confident in your abilities, it’s best to seek the assistance of a qualified mechanic.
Q: How much does it cost to fix an engine that only runs with the key in the start position?
A: The cost can vary depending on the specific issue, but it’s always best to get a quote from a qualified mechanic before starting any repairs.
Conclusion
An engine that only runs with the key in the start position can be a frustrating issue, but it is often a simple fix. By checking the ignition switch, starter motor, fuel pump, battery, wiring, and alternator, you can quickly diagnose and repair the issue. If you are unsure about any of these steps, it’s best to consult a qualified mechanic to avoid causing further damage to your vehicle.