* Lack of Fuel:
* Empty Tank: Check your fuel gauge, and if it's low, fill the tank.
* Fuel Pump Failure: The fuel pump might be malfunctioning, not delivering fuel to the engine. You might hear a whirring sound from the fuel pump area when you turn the key to the "on" position (but not cranking). If not, it's a strong suspect.
* Clogged Fuel Filter: A clogged fuel filter restricts fuel flow.
* Fuel Injectors: They might be clogged or faulty, preventing fuel from entering the cylinders.
* Fuel pressure regulator: This component regulates the fuel pressure, a problem here will mean no fuel reaching the engine.
* Lack of Spark:
* Ignition Coil: This component delivers high voltage to the spark plugs. A faulty coil will prevent sparking.
* Spark Plugs: Worn, fouled, or damaged spark plugs prevent ignition. Check their condition and gap.
* Ignition Wires (Plug Wires): Cracked or damaged wires can prevent spark from reaching the plugs.
* Crankshaft Position Sensor (CKP Sensor): This sensor tells the computer the engine's rotational position, crucial for timing the spark. A faulty sensor will prevent spark.
* Cam Position Sensor (CMP Sensor): Similar to the CKP sensor, but for the camshaft.
* Ignition Control Module (ICM): This controls the ignition system; a faulty module will cause ignition problems.
* Lack of Air:
* Air Filter: A severely clogged air filter restricts airflow, preventing proper combustion.
* Security System Issues:
* Immobilizer: Some vehicles have immobilizer systems that prevent starting unless the correct key is used. Try a different known good key if applicable.
* Alarm System: A malfunctioning alarm system might be preventing the engine from starting.
* Computer Problems (PCM/ECM):
* Engine Control Module (ECM) / Powertrain Control Module (PCM): The computer controls many aspects of the engine; a faulty ECM/PCM can cause various problems, including a no-start condition. This is often the most difficult to diagnose without specialized tools.
Troubleshooting Steps:
1. Check the obvious: Fuel level, air filter condition.
2. Listen closely: Do you hear the fuel pump prime when you turn the key to the "on" position (before cranking)?
3. Check for codes: Use an OBD-II scanner to read any diagnostic trouble codes (DTCs) stored in the ECM/PCM. These codes can provide valuable clues.
4. Visual Inspection: Look for obvious signs of damage to wires, connectors, or components.
5. Basic Tests: You might need a multimeter to check voltage at the fuel pump, ignition coil, and other components. This often requires some basic automotive electrical knowledge.
If you're not comfortable performing these checks yourself, it's best to take your Stratus to a qualified mechanic for diagnosis and repair. Trying to diagnose these issues without the proper tools and knowledge can be frustrating and potentially lead to further damage.
