* The PCM (Powertrain Control Module) is limiting speed: This is the most likely scenario. While there's no 130mph factory limit, the PCM can limit speed through various safety or performance parameters. It's unlikely a simple software adjustment will solve this. The reason for this limit would need to be investigated. It could be a related to a sensor issue, or even a previous modification done to the car.
* A faulty sensor: Problems with the Vehicle Speed Sensor (VSS) or other related sensors can cause the PCM to misinterpret speed and artificially limit it for safety.
* Transmission issues: Problems within the transmission could be causing the limit.
* Aftermarket Modifications: Some aftermarket performance modifications or tuning may have introduced a speed limiter as part of the package or as a safety feature.
To find the cause and potentially remove the limitation, you will need to:
1. Diagnose the problem: Take your Camaro to a reputable mechanic or automotive specialist, preferably one experienced with LS1 engines. They can use diagnostic equipment to scan the PCM for trouble codes and check sensor readings. This is crucial before attempting any modifications. Simply trying to bypass something without knowing the *why* is risky and could damage your vehicle.
2. Professional Tuning (If necessary): If the issue is related to PCM programming, professional tuning may be required. A qualified tuner can adjust the PCM's parameters to remove or adjust the speed limit, *but only after diagnosing the underlying cause.* Improper tuning can lead to serious engine damage.
3. Check for Aftermarket Modifications: If you or a previous owner made performance modifications, review the installation instructions or contact the installer/manufacturer to see if a speed limiter is part of the system.
Attempting to bypass the speed limiter yourself (without proper diagnosis and understanding) is dangerous and highly discouraged. It could result in significant damage to your car, including engine failure, transmission damage, or accidents. Your safety and the safety of others is paramount.
