High-Probability Issues:
* Neutral Safety Switch: This switch prevents the car from starting unless the transmission is in Park or Neutral. A faulty switch won't allow the starter to engage, even with power. Check to make sure the switch is properly adjusted and functioning. Testing it with a multimeter is recommended.
* Battery Cables and Connections: Even if you have power, corrosion or loose connections on the battery terminals, starter cable, or ground cable can prevent sufficient current flow. Clean all connections thoroughly and ensure they are tight.
* Ignition Wiring: A broken wire or poor connection somewhere in the ignition system's wiring harness can interrupt the signal to the starter. Inspect the wiring carefully for damage or loose connections, particularly those near the steering column and ignition switch.
* Flywheel: A broken or stripped flywheel prevents the starter from engaging with the engine. This requires a more involved inspection, possibly requiring removal of the transmission or starter.
* Solenoid: While you replaced the starter, the starter *solenoid* itself could be bad. This is the part that engages the starter motor with the flywheel. You might hear a click from the solenoid when you try to start the car – this often points to a faulty solenoid.
Less Likely (but still possible) Issues:
* Engine Computer (PCM): The PCM controls various engine functions, including the starter circuit. A faulty PCM is less common but possible. Diagnosis would require a professional scan tool.
* Broken or damaged ring gear on the flywheel: This is a more significant mechanical problem that would prevent the starter from turning the engine. This would also likely cause grinding noises if the starter *was* engaging.
* Security System (if equipped): Older Camaros sometimes had aftermarket or factory anti-theft systems that could prevent starting.
Troubleshooting Steps:
1. Check the Neutral Safety Switch: This is the easiest and most likely culprit.
2. Inspect all Battery and Starter Cables: Clean and tighten all connections.
3. Visually Inspect Wiring: Look for any obvious damage in the wiring harness.
4. Listen Carefully: When you turn the key, do you hear any clicks (solenoid) or grinding noises (flywheel/ring gear)?
5. Use a Multimeter: Test the voltage at the battery terminals, at the starter solenoid, and at the neutral safety switch. This will help pinpoint where the power is being interrupted.
If you're not comfortable working on your car's electrical system, it's best to take it to a qualified mechanic. Attempting repairs without proper knowledge could cause further damage. Provide them with the information above about the parts you've already replaced.
