* Ignition System: This is a prime suspect. Problems could include:
* Worn spark plugs or wires: These are common wear items and crucial for proper combustion. Misfires are almost guaranteed with bad plugs or wires.
* Failing ignition coil(s): A failing coil can cause misfires in one or more cylinders, leading to rough running and stalling. The fact it's happening at idle and under load points strongly to this.
* Distributor cap and rotor (if applicable): Older Camaros might have a distributor. Cracks or wear in these components can interrupt the spark, causing misfires.
* Crankshaft Position Sensor (CKP): This sensor tells the computer the engine's rotational position. A faulty CKP sensor can lead to erratic engine behavior and stalling.
* Fuel System:
* Fuel pump: A weak or failing fuel pump might not deliver enough fuel at idle, causing the engine to stall.
* Fuel filter: A clogged fuel filter restricts fuel flow, leading to similar problems.
* Fuel injectors: Clogged or malfunctioning injectors can lead to inconsistent fuel delivery.
* Mass Airflow Sensor (MAF): This sensor measures the amount of air entering the engine. A faulty MAF sensor can cause a lean or rich fuel mixture, leading to rough running and stalling.
* Idle Air Control (IAC) Valve: This valve controls the air intake at idle. A dirty or faulty IAC valve can cause stalling or rough idle.
* Vacuum Leaks: A leak in the vacuum system can disrupt the engine's operation, particularly at idle.
What to do:
1. Get the diagnostic trouble codes (DTCs): A code reader (available cheaply at auto parts stores) will read the codes stored in your car's computer. These codes will pinpoint potential problems. This is the MOST important first step.
2. Inspect the obvious: Check your spark plugs and wires for obvious signs of wear or damage.
3. Check for vacuum leaks: Visually inspect all vacuum hoses for cracks or loose connections.
4. Professional diagnosis: Given the severity of the symptoms (stalling), taking your car to a mechanic is highly recommended. Trying to troubleshoot this without the DTCs and basic diagnostic tools could lead to wasted time and money on unnecessary parts.
Important Note: Driving a car with these symptoms is risky. The misfires could lead to further engine damage. Minimize driving until the problem is diagnosed and repaired.
