* Distributor Issues (if applicable): If your 95 Camaro has a distributor (unlikely for a V6, more likely for a V8), a slightly loose or improperly seated distributor cap or rotor could cause misfiring that manifests as shaking when turning. The act of turning the wheel adds load, which accentuates a weak spark. Check the distributor cap and rotor for cracks, wear, and proper seating. Ensure the distributor is securely fastened.
* Ignition System Issues (even if you replaced parts):
* Plug Wires Misrouted or Damaged: Even if new, plug wires incorrectly routed can cause interference or misfires. Double-check the routing diagram for your engine. Ensure there are no kinks or pinched wires.
* Spark Plug Gap Incorrect: Incorrect spark plug gap can cause misfires. Even if you gapped them, double check the gap with a feeler gauge to ensure they're within the manufacturer's specifications for your engine.
* Faulty Coil Pack (or Coil): A failing coil pack (or individual coil for each cylinder if applicable) can cause intermittent misfires. This is less likely if you've recently changed the plugs & wires, but it's still a possibility. Look for cracks or signs of overheating on the coil(s).
* Ignition Control Module (ICM): A problem with the ICM can cause inconsistent spark delivery. This is less common, but possible.
* Something disturbed during work:
* Loose or Damaged Vacuum Hose: During the oil change or other repairs, a vacuum hose could have been knocked loose or damaged. Vacuum leaks can lead to rough running and shaking, particularly under load (like turning). Inspect all vacuum lines for tightness and damage.
* Balance Shaft Issues (if applicable): Some engines have balance shafts to reduce vibrations. If these shafts are damaged or have lost oil, it can cause vibrations. This is less likely given your recent maintenance, unless something happened during the work.
* Unrelated Problem: While less probable, the shaking could be completely unrelated to the recent work. Things like worn-out suspension components or a tire problem can cause vibration and shaking, especially when turning.
Troubleshooting Steps:
1. Recheck Everything: Go back over all your work. Carefully examine the spark plugs, wires, distributor (if applicable), and coil packs for any damage, loose connections, or improper installation.
2. Check for Vacuum Leaks: Inspect all vacuum hoses for cracks, looseness, and correct routing.
3. Listen for Misfires: Start the engine and listen carefully for any unusual sounds like popping or backfiring. This can help pinpoint a cylinder with an ignition problem.
4. Check Engine Codes: Use an OBD-II scanner to read any trouble codes stored by the car's computer. This will provide clues about the source of the problem.
5. Test Drive (Carefully): Once you've checked everything, take it for a short test drive, paying close attention to when and how the shaking occurs.
If you're not comfortable diagnosing this yourself, take it to a mechanic. Explaining the symptoms and the work you recently did will help them narrow down the cause quickly.
