Fuel System Issues:
* Empty or low fuel: The most obvious, but often overlooked. Check your fuel gauge.
* Fuel pump failure: The pump might not be delivering fuel to the engine. This could be due to a faulty pump itself, a blown fuse, or a relay problem.
* Fuel filter clogged: A clogged filter restricts fuel flow.
* Fuel pressure regulator malfunction: This regulates fuel pressure; a faulty one can cause inconsistent fuel delivery.
* Clogged fuel injectors: If the injectors are clogged, fuel can't reach the cylinders properly.
Ignition System Problems:
* Crankshaft Position Sensor (CKP) failure: This sensor tells the engine's computer where the crankshaft is; a faulty sensor can prevent the engine from running.
* Camshaft Position Sensor (CMP) failure: Similar to the CKP sensor, but for the camshaft.
* Ignition coil malfunction: The coil provides the high voltage spark to ignite the fuel; a weak or failed coil will prevent combustion.
* Spark plugs: Worn, fouled, or improperly gapped spark plugs can prevent ignition.
* Ignition switch problem: A faulty ignition switch may not be providing enough power to the system.
Other Potential Causes:
* Low battery voltage: A weak battery may not provide enough power to keep the engine running.
* Alternator failure: The alternator charges the battery; a failed alternator will eventually drain the battery and cause the engine to die.
* Security system issue: Some vehicles have security systems that can prevent the engine from starting or running if they detect a problem.
* Computer (ECU) problem: A fault in the engine control unit can cause various issues, including immediate shutdown.
* Throttle Position Sensor (TPS) problem: This sensor tells the engine how much the throttle is open. A faulty sensor can cause erratic operation or shutdown.
* Air intake system problems: A major vacuum leak can cause the engine to stall immediately after starting.
What to do:
1. Check the obvious: Fuel level, battery condition (voltage test with a multimeter is best), and any obvious warning lights on the dashboard.
2. Consult your owner's manual: It may provide troubleshooting tips for specific symptoms.
3. Have it professionally diagnosed: This is the best approach. A mechanic can use diagnostic tools to identify the precise problem far more efficiently than trying to guess.
Don't attempt extensive repairs yourself unless you have experience working on cars. Incorrect repairs can cause further damage. Get a professional opinion to avoid unnecessary costs and potential harm.
