While the original article doesn’t directly address how to disable a governor on pre-OBD2 vehicles, it provides valuable information about catalytic converters and their corresponding Executive Order (EO) numbers. Understanding your vehicle’s emissions system is crucial before making any modifications, including disabling the governor. This article clarifies the relationship between catalytic converters and EO numbers for pre-OBD2 vehicles, laying the groundwork for understanding potential impacts of modifications.
Understanding Pre-OBD2 Governors
Pre-OBD2 vehicles, manufactured before 1996, often have mechanical or vacuum-operated governors that limit top speed. These governors were implemented for safety and fuel efficiency reasons. Disabling them might involve adjusting the mechanical linkage or modifying the vacuum system. However, it’s crucial to understand that tampering with emissions-related components, which might be indirectly affected by governor removal, could lead to failed emissions tests.
Catalytic Converters and Executive Orders
The original article provides a comprehensive list of catalytic converters and their associated EO numbers. This information is essential for ensuring your vehicle’s emissions system complies with California Air Resources Board (CARB) regulations.
Why are EO numbers important? They verify that a specific catalytic converter meets CARB’s emission standards for a particular vehicle category. These categories include:
- PC-1: Pre-OBD II passenger cars with one catalytic converter per exhaust bank
- PC-2: Pre-OBD II passenger cars with more than one catalytic converter per exhaust bank
- T-1: Trucks with one catalytic converter per exhaust bank
- T-2: Trucks with more than one catalytic converter per exhaust bank
The table in the original article lists EO numbers, corresponding series, vehicle category, manufacturer, and contact information. This allows you to verify the correct catalytic converter for your pre-OBD2 vehicle.
Potential Impact of Governor Removal on Emissions
While not explicitly stated in the original article, modifying a pre-OBD2 vehicle’s governor could indirectly impact its emissions system. For instance, if the governor limits engine RPM and removing it allows the engine to rev higher, this could affect the operating conditions of the catalytic converter and potentially increase emissions. It’s important to consult a qualified mechanic before making such modifications to ensure your vehicle remains compliant with emissions regulations. Always check local laws and regulations before modifying your vehicle.
Inspection Alert for Specific Catalytic Converters
The original article includes an important alert regarding catalytic converters manufactured by International Muffler Company (Cherry Bomb/Maremont). These converters have an extra zero in their EO number label. During inspections, ensure you use the correct EO number without the extra zero when verifying compliance.
Conclusion
While this article doesn’t provide a step-by-step guide on how to disable a governor on a pre-OBD2 vehicle, understanding the context of catalytic converters and EO numbers is crucial before undertaking such modifications. Always prioritize safety and compliance with local emissions regulations. Consulting a qualified mechanic is highly recommended before modifying your vehicle’s emissions or performance systems.
