* Fuel Pump: The most common cause. A weak or failing fuel pump may not be providing sufficient pressure to deliver fuel to the injectors. It might work intermittently, explaining why it starts with starter fluid (which provides a temporary fuel source). Listen for the fuel pump's whirring sound when you turn the key to the "on" position (before cranking). A weak or absent sound points to the pump.
* Fuel Filter: A clogged fuel filter restricts fuel flow. The pressure might be adequate at the pump, but insufficient at the injectors due to the blockage.
* Fuel Injectors: Clogged or malfunctioning fuel injectors could prevent fuel from reaching the combustion chamber. This is less likely if the car runs (even briefly) with starter fluid, but it's still a possibility. They may need cleaning or replacement.
* Fuel Pressure Regulator: This component regulates the fuel pressure in the system. A faulty regulator might be causing low fuel pressure.
* Crankshaft Position Sensor (CKP): While less likely given it starts with starter fluid, a faulty CKP sensor can prevent the engine from starting by not properly signaling the engine's rotational position to the fuel injection system. This could prevent the injectors from firing, even if fuel is available.
* Ignition System (Less Likely): While starter fluid bypasses the ignition system momentarily, an underlying ignition problem (like a weak spark) could contribute to the difficulty starting. However, this is less probable if it starts with starter fluid.
Troubleshooting Steps (in order of likelihood and cost):
1. Check Fuel Pressure: This is the most important step. You'll need a fuel pressure gauge to measure the pressure at the fuel rail. Compare your reading to the specifications in your car's repair manual.
2. Listen for the Fuel Pump: As mentioned above, listen closely when you turn the key to the "on" position.
3. Inspect the Fuel Filter: Visually inspect the fuel filter for damage or excessive rust.
4. Check Fuel Injectors (Advanced): Testing fuel injectors requires specialized equipment, and it's best left to a mechanic unless you have experience.
5. Check Crankshaft Position Sensor (Advanced): This requires checking for proper sensor output and requires a multimeter or scan tool.
Important Warning: Using starter fluid frequently is dangerous and can damage the engine. It's only for diagnostic purposes. Don't rely on it to start your car. Address the underlying fuel system issue immediately.
If you're not comfortable performing these checks yourself, take your Camaro to a qualified mechanic for diagnosis and repair. They have the tools and expertise to pinpoint the problem accurately and safely.
