What are the reasons why the LaCrosse won't start but has power?
2 Answers
If the LaCrosse is relatively old and the battery is confirmed to have power, other possible reasons are as follows: 1. Starter motor failure: The starter motor typically has a lifespan of around 100,000 kilometers. Prolonged use can lead to carbon brush damage, preventing the engine from starting. 2. Fuel pump failure: This can result in no fuel supply, causing the car to fail to start. 3. Gear in D position: The car cannot be started in this gear due to a self-protection mechanism that prevents the vehicle from lurching forward after ignition. 4. Engine speed sensor (crankshaft position sensor) failure: This can cause the vehicle to lack high-voltage spark, preventing normal startup.
I've been driving an old LaCrosse for ten years, and it's quite common to have power but no start, often due to starter issues. Like last time when I tried to start it, I only heard a 'click' but the engine wouldn't fire. You should also check the ignition system—if the spark plugs are severely carbon-fouled or the ignition coil is shorted, it's normal for the engine not to start. Don’t forget to inspect the fuel system; if the fuel pump has low pressure or the filter screen is clogged, insufficient fuel supply can also prevent starting. Additionally, ECU sensor failures in the LaCrosse can cause this, such as a faulty crankshaft position sensor—if the computer can’t read the engine speed, it won’t start. You can first try turning the key to listen for changes in sound. If you only hear noise but no engine response, take it to a repair shop immediately to check the starter and fuel pump wiring.
