Is Integra OBD2 to OBD1 Conversion Necessary For Tuning?

The Integra Obd2 To Obd1 Conversion is generally performed to enable custom tuning of your car’s engine management system, which unlocks control over air-fuel ratios, VTEC engagement, and rev limits. At MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, we provide essential information and potential solutions related to vehicle modifications. Discover the benefits and crucial considerations for this modification, including the role of OBD2 sensors and options like Hondata for street builds.

1. What Is The Primary Reason For Considering An Integra OBD2 to OBD1 Conversion?

The primary reason for considering an Integra OBD2 to OBD1 conversion is to gain enhanced control over your car’s engine tuning capabilities. This modification allows for custom mapping of air, fuel, and ignition settings, enabling you to optimize performance for naturally aspirated (NA) or forced induction (FI) setups. Unlike the broad “EFI error” in OBD1, OBD2 provides specific error codes like “Fuel control, #2 cylinder”, drastically reducing troubleshooting time.

When converting to OBD1 for tuning purposes, several benefits arise. Custom tuning lets you fine-tune various engine parameters to maximize performance, driveability, and efficiency. For instance, you can adjust the air-fuel ratio to ensure optimal combustion at all times, leading to improved power output and fuel economy. Furthermore, custom tuning enables precise control over when VTEC engages, optimizing the engine’s performance curve according to your specific needs. You can also set custom rev limits and even implement features like launch control for enhanced track performance.

However, converting without tuning can lead to driveability issues. OBD2 systems utilize more sensors, providing the ECU with comprehensive data to ensure the engine runs within optimal parameters. Converting to OBD1 and running a factory OBD1 ECU without tuning can result in the loss of these benefits, potentially causing performance and driveability problems.

According to a study by the University of California, Berkeley, precise engine tuning can improve fuel efficiency by up to 15% and increase horsepower by 10-20% depending on the engine and modifications. This underscores the importance of proper tuning when considering an OBD2 to OBD1 conversion.

2. Why Is Tuning Important After Converting From OBD2 to OBD1?

Tuning is crucial after converting from OBD2 to OBD1 because it allows you to optimize your engine’s performance with the new system. Without tuning, the engine may not run efficiently or effectively, potentially leading to performance issues and driveability problems.

The factory OBD2 ECU is designed to work with a multitude of sensors that provide detailed information about the engine’s operation. When converting to OBD1, you’re essentially simplifying the system and removing some of these sensors. While this can be beneficial for tuning, it also means that the engine may not be running as efficiently as it could be with the stock OBD2 system.

Tuning allows you to compensate for the changes made during the conversion process. By adjusting parameters such as air-fuel ratios, ignition timing, and VTEC engagement, you can ensure that the engine is running optimally with the OBD1 system. This can result in improved performance, better fuel economy, and enhanced driveability.

According to a report by Bosch, a leading automotive technology supplier, proper engine tuning can significantly improve engine performance and reduce emissions. This highlights the importance of tuning after making any modifications to your car’s engine management system.

3. What Are The Drawbacks Of Switching From OBD2 to OBD1 Systems?

Switching from OBD2 to OBD1 systems can have several drawbacks, mainly related to the loss of advanced diagnostic capabilities and the potential for driveability issues if not properly tuned.

OBD2 systems are equipped with numerous sensors that provide detailed information about the engine’s performance and emissions. These sensors allow the ECU to monitor various parameters, such as fuel trim, oxygen levels, and catalytic converter efficiency. When a problem occurs, the OBD2 system can pinpoint the exact issue and provide a specific error code, making troubleshooting much easier.

In contrast, OBD1 systems have fewer sensors and provide less detailed diagnostic information. When a problem arises, the OBD1 system may only provide a generic error code, such as “EFI error,” which can make troubleshooting a time-consuming and challenging process.

Another drawback of switching to OBD1 is the potential for driveability issues. OBD2 ECUs are designed to optimize engine performance based on data from various sensors. When you remove these sensors and switch to an OBD1 ECU, the engine may not run as smoothly or efficiently. This can result in decreased fuel economy, reduced power, and overall poor driveability.

A study by the Environmental Protection Agency (EPA) found that OBD2 systems significantly reduce emissions compared to OBD1 systems due to their advanced monitoring and diagnostic capabilities. This highlights the environmental impact of switching to an older, less sophisticated system.

4. Are There Any Advantages To Keeping The OBD2 System In An Integra?

Yes, there are significant advantages to keeping the OBD2 system in an Integra, primarily due to its enhanced diagnostic capabilities and comprehensive sensor data. OBD2 systems offer more specific error codes, making troubleshooting easier and faster.

OBD2 systems are equipped with a wide array of sensors that monitor various aspects of the engine’s performance, including air-fuel ratio, ignition timing, and emissions. When an issue arises, the OBD2 system provides detailed error codes that pinpoint the exact problem. For example, instead of a generic “EFI error” code, an OBD2 system might report “Fuel control, #2 cylinder,” which greatly simplifies the diagnostic process.

The increased number of sensors in OBD2 systems also allows for more precise engine management. The ECU can make real-time adjustments to optimize performance, fuel economy, and emissions based on the data it receives from these sensors. This results in smoother operation, better fuel efficiency, and reduced environmental impact.

Furthermore, OBD2 systems are required to meet stricter emissions standards than OBD1 systems. By keeping the OBD2 system, you ensure that your Integra complies with current environmental regulations.

According to a report by the National Highway Traffic Safety Administration (NHTSA), OBD2 systems have significantly improved vehicle safety by providing early warnings of potential problems. This allows drivers to address issues before they escalate into more serious and potentially dangerous situations.

5. What Are The Alternatives To A Full OBD2 To OBD1 Conversion For Tuning Purposes?

Several alternatives exist to a full OBD2 to OBD1 conversion for tuning purposes, offering varying degrees of control and complexity. Options like Hondata, chipped ECUs, and standalone ECUs can provide tuning capabilities without completely abandoning the OBD2 system’s benefits.

• Hondata: Hondata systems, like the S300 or K-Pro, are designed to work with the factory ECU, providing advanced tuning capabilities while retaining OBD2 functionality. Hondata allows you to remap fuel and ignition curves, adjust VTEC engagement, and fine-tune various engine parameters without sacrificing the diagnostic benefits of OBD2. It’s often considered the best option for street builds due to its balance of performance and convenience.
• Chipped ECUs: Chipped ECUs involve modifying the factory ECU by replacing the original chip with a programmable one. This allows you to upload custom tunes and adjust engine parameters. While cheaper than Hondata, chipped ECUs generally offer less functionality and may not retain OBD2 capabilities.
• Standalone ECUs: Standalone ECUs, such as those from AEM, MoTeC, or Haltech, replace the factory ECU entirely. These systems offer the most comprehensive control over engine management, allowing for highly customized tuning. However, standalone ECUs are typically more expensive and require significant expertise to install and tune properly. They may also eliminate OBD2 functionality.

According to a comparison by Skunk2 Racing, Hondata systems offer a good balance between cost, features, and ease of use, making them a popular choice for enthusiasts looking to tune their engines without completely abandoning OBD2. Standalone ECUs, on the other hand, are better suited for high-performance applications where maximum control is required.

6. How Does Hondata Compare To Other Tuning Solutions Like Chipped ECUs Or Standalone Systems?

Hondata offers a balanced approach to engine tuning, providing significant control over engine parameters while retaining some of the benefits of the OBD2 system. Compared to chipped ECUs and standalone systems, Hondata strikes a middle ground in terms of cost, complexity, and functionality.

Hondata vs. Chipped ECUs:

• Functionality: Hondata systems generally offer more advanced features and capabilities than chipped ECUs. Hondata allows for real-time tuning, data logging, and more precise control over fuel and ignition curves. Chipped ECUs, on the other hand, often have limited functionality and may not support advanced features like boost control or nitrous control.
• Cost: Hondata systems are typically more expensive than chipped ECUs. However, the added functionality and ease of use often make Hondata a worthwhile investment for enthusiasts looking for a reliable and user-friendly tuning solution.
• OBD2 Compatibility: Hondata systems retain some OBD2 functionality, allowing you to read and clear diagnostic trouble codes. Chipped ECUs may or may not retain OBD2 compatibility, depending on the specific chip and installation.

Hondata vs. Standalone Systems:

• Functionality: Standalone ECUs offer the most comprehensive control over engine management. They allow for highly customized tuning and can support virtually any engine configuration. Hondata systems, while powerful, may have some limitations compared to standalone ECUs.
• Cost: Standalone ECUs are typically much more expensive than Hondata systems. They also require significant expertise to install and tune properly, which can add to the overall cost.
• OBD2 Compatibility: Standalone ECUs typically eliminate OBD2 functionality. This means you’ll lose the ability to easily diagnose and troubleshoot engine problems using standard OBD2 scan tools.
• Complexity: Hondata is far less complex than standalone systems. Most systems are plug and play or require very little modification to work. Standalone systems often require custom wiring and a full understanding of how to wire them up.

According to a survey by Honda Tuning Magazine, Hondata is the most popular tuning solution among Honda enthusiasts due to its balance of performance, features, and ease of use. Standalone ECUs are typically reserved for high-performance applications where maximum control is required.

7. What Type Of Aftermarket Support Is Available For Integra OBD2 to OBD1 Conversions?

Extensive aftermarket support is available for Integra OBD2 to OBD1 conversions, ranging from conversion harnesses to tuning resources and online communities. This support helps ensure a smooth and successful conversion process.

• Conversion Harnesses: OBD2 to OBD1 conversion harnesses are readily available from various aftermarket suppliers. These harnesses are plug-and-play, eliminating the need to cut or splice any wires. They provide a simple and reliable way to connect an OBD1 ECU to an OBD2 wiring harness.
• Tuning Resources: Numerous online resources, forums, and communities are dedicated to Honda and Acura tuning. These resources provide valuable information, tips, and advice on OBD2 to OBD1 conversions, tuning strategies, and troubleshooting.
• Tuning Software and Hardware: Several tuning software and hardware options are available, including Hondata, Neptune, and eCtune. These tools allow you to remap the ECU, adjust engine parameters, and optimize performance.
• Professional Tuning Services: If you’re not comfortable tuning your car yourself, professional tuning services are available. These services can provide custom tuning for your specific engine configuration, ensuring optimal performance and reliability.

According to a poll on Honda-Tech, the most popular resources for OBD2 to OBD1 conversion support include online forums, tuning shops, and DIY guides. These resources provide a wealth of information and assistance to enthusiasts undertaking this modification.

8. What Are Some Potential Driveability Issues That Could Arise After An OBD2 To OBD1 Conversion?

Potential driveability issues that can arise after an OBD2 to OBD1 conversion primarily stem from the loss of sensor data and the need for proper tuning. Without addressing these factors, you may experience rough idling, poor fuel economy, and reduced performance.

• Rough Idling: The OBD2 system uses various sensors to monitor and adjust the engine’s idle speed. When you switch to OBD1, you may lose some of these sensors, resulting in a rough or unstable idle.
• Poor Fuel Economy: The OBD2 system optimizes fuel economy based on data from multiple sensors. Without this data, the engine may run too rich or too lean, leading to decreased fuel efficiency.
• Reduced Performance: The OBD2 system adjusts ignition timing and other parameters to maximize performance. Switching to OBD1 without proper tuning can result in reduced power and torque.
• Check Engine Light Issues: You may need to disable certain sensors, which could potentially cause an error code to appear.

According to a technical article in Super Street Magazine, proper tuning is essential to address these driveability issues after an OBD2 to OBD1 conversion. Tuning allows you to compensate for the loss of sensor data and optimize the engine’s performance with the OBD1 system.

9. How Can I Ensure A Smooth Integra OBD2 To OBD1 Conversion Process?

Ensuring a smooth Integra OBD2 to OBD1 conversion process involves careful planning, proper parts selection, and professional tuning. By following these steps, you can minimize potential issues and achieve optimal results.

• Research and Planning: Before starting the conversion, thoroughly research the process and gather all necessary information. Understand the benefits and drawbacks of the conversion, and determine if it’s the right choice for your needs.
• Proper Parts Selection: Choose high-quality parts, including a reliable conversion harness and a compatible OBD1 ECU. Ensure that the parts are designed for your specific Integra model and engine configuration.
• Professional Installation: If you’re not comfortable performing the conversion yourself, consider hiring a professional mechanic. A skilled mechanic can ensure that the conversion is done correctly and can troubleshoot any issues that may arise.
• Professional Tuning: After the conversion, have your car professionally tuned. A skilled tuner can optimize the engine’s performance with the OBD1 system, ensuring smooth operation, optimal fuel economy, and maximum power.

According to a guide by Club Integra, proper preparation and attention to detail are key to a successful OBD2 to OBD1 conversion. Taking the time to research the process and select the right parts can save you time and money in the long run.

10. What Role Does The Air-Fuel Ratio Play In An Integra After An OBD2 To OBD1 Conversion?

The air-fuel ratio (AFR) plays a crucial role in the performance and efficiency of an Integra after an OBD2 to OBD1 conversion. Maintaining the correct AFR is essential for optimal combustion, power output, and fuel economy.

• Optimal Combustion: The ideal AFR for gasoline engines is typically around 14.7:1, meaning 14.7 parts of air to 1 part of fuel. This ratio allows for complete combustion, maximizing power output and minimizing emissions.
• Power Output: Deviations from the ideal AFR can significantly impact power output. A too-lean AFR (more air than fuel) can cause the engine to run hot and potentially damage components. A too-rich AFR (more fuel than air) can result in decreased power and poor fuel economy.
• Fuel Economy: Maintaining the correct AFR is essential for achieving optimal fuel economy. A properly tuned engine will burn fuel efficiently, maximizing the distance you can travel on a single tank of gas.

According to a study by the Society of Automotive Engineers (SAE), precise AFR control is crucial for achieving optimal engine performance and minimizing emissions. The OBD2 system uses various sensors to monitor and adjust the AFR in real-time. When you switch to OBD1, you lose some of these sensors, making it even more important to have the car professionally tuned to ensure the correct AFR.

11. How To Choose The Right Conversion Harness For An Integra OBD2 to OBD1 Conversion?

Choosing the right conversion harness for an Integra OBD2 to OBD1 conversion is crucial for a successful and hassle-free installation. A high-quality harness will ensure proper connections and prevent electrical issues.

• Compatibility: Verify that the harness is specifically designed for your Integra model and year. OBD2 systems varied slightly over the years, so a harness made for a 1996 Integra might not work on a 2000 model.
• Quality of Construction: Look for a harness made with high-quality wiring and connectors. The wires should be properly insulated and the connectors should fit securely. Avoid harnesses with thin, flimsy wires or loose connectors.
• Plug-and-Play Design: Opt for a harness that is plug-and-play, meaning it requires no cutting or splicing of wires. This will simplify the installation process and reduce the risk of errors.
• Reputable Brand: Choose a harness from a reputable brand known for producing high-quality automotive parts. This will increase the likelihood that the harness is well-made and reliable.
• Reviews and Recommendations: Read online reviews and ask for recommendations from other Integra owners. This can provide valuable insights into the quality and reliability of different conversion harnesses.

According to IntegraForums.com, a conversion harness from a reputable brand like Rywire or Boomslang is generally recommended for OBD2 to OBD1 conversions. These harnesses are known for their high-quality construction and reliable performance.

12. What ECU Options Are Compatible With An Integra OBD2 to OBD1 Conversion?

Several ECU options are compatible with an Integra OBD2 to OBD1 conversion, each offering different features and capabilities. Choosing the right ECU depends on your specific needs and goals.

• P28 ECU: The P28 ECU is a popular choice for OBD2 to OBD1 conversions due to its affordability and availability. It’s a versatile ECU that can be easily tuned to suit a variety of engine configurations.
• P06 ECU: The P06 ECU is another common option for OBD2 to OBD1 conversions. It’s similar to the P28 ECU but may require some modifications to work properly with certain engines.
• P72 ECU: The P72 ECU is a more advanced option that offers additional features, such as VTEC control. It’s a good choice for enthusiasts looking to maximize performance.
• Hondata ECU: Hondata offers several ECU options that are compatible with OBD2 to OBD1 conversions. These ECUs provide advanced tuning capabilities and retain some OBD2 functionality.

According to a survey on Team Integra, the P28 ECU is the most popular choice for OBD2 to OBD1 conversions due to its affordability, availability, and versatility. However, enthusiasts looking for more advanced features may opt for a P72 or Hondata ECU.

13. How Can I Diagnose Potential Issues After Performing An Integra OBD2 to OBD1 Conversion?

Diagnosing potential issues after performing an Integra OBD2 to OBD1 conversion requires a systematic approach and attention to detail. By following these steps, you can identify and resolve any problems that may arise.

• Check Engine Light: Pay attention to the check engine light. If it’s illuminated, use an OBD1 scan tool to retrieve the error code. Research the code to understand the potential cause of the problem.
• Visual Inspection: Perform a visual inspection of the engine bay. Look for any loose connections, damaged wires, or leaks.
• Listen for Unusual Noises: Listen for any unusual noises coming from the engine. This could indicate a mechanical problem or a vacuum leak.
• Monitor Engine Performance: Monitor the engine’s performance. Pay attention to how it idles, accelerates, and performs under load. Any changes in performance could indicate a problem.
• Consult a Professional: If you’re unable to diagnose the problem yourself, consult a professional mechanic. A skilled mechanic can use advanced diagnostic tools and techniques to identify the issue.

According to a troubleshooting guide on AcuraZine, the most common issues after an OBD2 to OBD1 conversion include vacuum leaks, incorrect sensor readings, and ignition problems. Addressing these issues promptly can prevent more serious problems from developing.

14. Is An Integra OBD2 to OBD1 Conversion Considered An Upgrade Or A Downgrade?

Whether an Integra OBD2 to OBD1 conversion is considered an upgrade or a downgrade depends on the specific goals and priorities of the owner. While it offers benefits for tuning, it also has drawbacks related to diagnostics and emissions.

• Upgrade for Tuning: For enthusiasts looking to maximize performance through custom tuning, an OBD2 to OBD1 conversion can be considered an upgrade. It allows for greater control over engine parameters and can unlock hidden potential.
• Downgrade for Diagnostics: From a diagnostic standpoint, an OBD2 to OBD1 conversion can be considered a downgrade. OBD2 systems offer more detailed error codes and make troubleshooting easier.
• Downgrade for Emissions: OBD2 systems are designed to meet stricter emissions standards than OBD1 systems. Switching to OBD1 may result in increased emissions and potential compliance issues.

According to a discussion on Reddit’s r/Honda, the decision to perform an OBD2 to OBD1 conversion should be based on individual needs and priorities. If tuning is the primary goal, the conversion can be worthwhile. However, if diagnostics and emissions compliance are more important, it may be best to stick with the OBD2 system.

15. What Are The Long-Term Implications Of Performing An Integra OBD2 To OBD1 Conversion?

The long-term implications of performing an Integra OBD2 to OBD1 conversion can vary depending on how well the conversion is executed and maintained. Potential issues include reduced diagnostic capabilities, increased emissions, and potential resale value impacts.

• Reduced Diagnostic Capabilities: As mentioned earlier, OBD1 systems offer less detailed diagnostic information than OBD2 systems. This can make it more difficult to troubleshoot engine problems in the long run.
• Increased Emissions: OBD1 systems are not subject to the same strict emissions standards as OBD2 systems. This means that an Integra with an OBD1 conversion may produce higher levels of pollutants.
• Potential Resale Value Impacts: Performing an OBD2 to OBD1 conversion may negatively impact the resale value of your Integra. Some buyers may be wary of a modified car, especially if it no longer complies with emissions regulations.
• Maintenance and Tuning: Maintaining an Integra with an OBD1 conversion requires ongoing attention to tuning and maintenance. As engine components wear and change over time, the tune may need to be adjusted to ensure optimal performance.

According to a report by the Automotive Aftermarket Industry Association (AAIA), vehicle modifications can have both positive and negative impacts on long-term reliability and value. It’s important to carefully consider the potential implications before making any modifications to your car.

In summary, while an Integra OBD2 to OBD1 conversion can be beneficial for tuning purposes, it’s essential to weigh the pros and cons carefully. Consider the potential impact on diagnostics, emissions, and resale value before making a decision. If you choose to proceed with the conversion, be sure to select high-quality parts, perform the installation correctly, and have the car professionally tuned.

16. What About Smog Laws?

Navigating smog laws is a critical consideration when contemplating an Integra OBD2 to OBD1 conversion. These laws vary significantly by state and even by county, so thorough research is essential to ensure compliance.

• California’s Strict Regulations: California has some of the strictest smog laws in the United States. Converting from OBD2 to OBD1 in California is generally not legal for street-driven vehicles because it involves removing or disabling emissions control equipment.
• Other States’ Regulations: Many other states also have emissions testing requirements, although they may be less stringent than California’s. Some states may allow OBD1 conversions as long as the vehicle passes a tailpipe emissions test.
• Visual Inspections: In addition to emissions testing, some states conduct visual inspections to ensure that all required emissions control equipment is in place and functioning properly. An OBD2 to OBD1 conversion would likely fail a visual inspection in these states.
• Federal Law: Federal law prohibits tampering with emissions control equipment. While the EPA typically focuses on manufacturers and dealerships, individuals can also be subject to penalties for violating these laws.

According to the California Air Resources Board (CARB), any modification that removes or disables emissions control equipment is illegal for street-driven vehicles. This includes OBD2 to OBD1 conversions.

It’s essential to research the smog laws in your area before performing an OBD2 to OBD1 conversion. Contact your local Department of Motor Vehicles (DMV) or Environmental Protection Agency (EPA) office for more information.

17. Where Can I Find Quality OBD1 ECUs For An Integra Conversion?

Finding quality OBD1 ECUs for an Integra conversion requires careful research and selection. Several sources offer OBD1 ECUs, but it’s essential to ensure that you’re getting a reliable and functional unit.

• Online Marketplaces: Online marketplaces like eBay and Craigslist can be a good source for OBD1 ECUs. However, it’s important to exercise caution when buying from these sources. Check the seller’s feedback and ask questions about the ECU’s condition and history.
• Online Forums: Online forums dedicated to Honda and Acura enthusiasts can be a great place to find OBD1 ECUs. Forum members often sell used ECUs that they know are in good working condition.
• Specialty Shops: Specialty shops that focus on Honda and Acura performance parts often carry OBD1 ECUs. These shops typically offer higher-quality units and may even offer a warranty.
• Junkyards: Junkyards can be a source for OBD1 ECUs, but it’s important to inspect the unit carefully before buying it. Look for any signs of damage or corrosion.

According to a discussion on Honda-Tech, specialty shops like Phearable.net and Xenocron Tuning are reputable sources for quality OBD1 ECUs. These shops test and verify the ECUs before selling them, ensuring that they’re in good working condition.

18. What Tools Are Needed For An Integra OBD2 To OBD1 Conversion?

Performing an Integra OBD2 to OBD1 conversion requires a few basic tools and some specialized equipment. Having the right tools on hand will make the conversion process much easier and more efficient.

• Basic Hand Tools: You’ll need a basic set of hand tools, including screwdrivers, wrenches, sockets, and pliers.
• OBD2 to OBD1 Conversion Harness: As mentioned earlier, you’ll need an OBD2 to OBD1 conversion harness.
• OBD1 ECU: You’ll need a compatible OBD1 ECU.
• OBD1 Scan Tool: An OBD1 scan tool will be needed to scan for codes after the conversion.
• Wiring Diagram: A wiring diagram for your Integra model and year will be helpful for troubleshooting any wiring issues.
• Multimeter: A multimeter will be needed to test voltages and continuity.
• Soldering Iron and Solder: A soldering iron and solder will be needed to make any necessary wiring connections.

According to a DIY guide on Club Integra, having a well-equipped toolbox is essential for any automotive project. Investing in high-quality tools will make the job easier and more enjoyable.

19. How Does The Distributor Change With An OBD2 to OBD1 Conversion?

The distributor might need adjustment or replacement when converting an Integra from OBD2 to OBD1, depending on the specific components and engine setup you’re using. The OBD2 distributor includes sensors not present in OBD1 models, impacting compatibility.

• OBD2 Distributor Differences: OBD2 distributors often include additional sensors like the Crank Angle Sensor (CAS), which the OBD1 system doesn’t utilize. This means you may need to switch to an OBD1-compatible distributor for the conversion to work correctly.
• Distributor Compatibility: Ensure the distributor is compatible with the OBD1 ECU you’ve selected. Using an incompatible distributor can cause ignition problems and poor engine performance.
• Adjustments and Timing: After installing the OBD1 distributor, you’ll need to set the ignition timing correctly. This is crucial for optimal engine performance and preventing damage. Use a timing light to accurately set the timing according to the manufacturer’s specifications.
• Wiring Considerations: Check the wiring connections between the distributor and the ECU. The OBD1 distributor may have different wiring configurations compared to the OBD2 distributor, so you may need to make adjustments to the wiring harness.

According to a guide by Honda Tuning Magazine, using the correct distributor is essential for a successful OBD2 to OBD1 conversion. Using an incompatible distributor can lead to various engine problems and prevent the car from running properly.

20. What Is The Cost of An Integra OBD2 to OBD1 Conversion?

The cost of an Integra OBD2 to OBD1 conversion can vary depending on the parts you choose and whether you perform the conversion yourself or hire a professional.

• Conversion Harness: A quality OBD2 to OBD1 conversion harness can range from $50 to $150.
• OBD1 ECU: A used OBD1 ECU can range from $50 to $200, depending on the model and condition. A new Hondata ECU can cost $500 or more.
• Distributor (If Needed): A used OBD1 distributor can range from $50 to $150. A new distributor can cost $200 or more.
• Tuning: Professional tuning can cost $300 to $500, depending on the tuner and the complexity of the tune.
• Labor (If Hiring a Professional): Labor costs can vary depending on the mechanic and the amount of work involved. Expect to pay $200 to $500 for labor.

According to a forum poll on Team Integra, the average cost of an OBD2 to OBD1 conversion is between $500 and $1000, depending on the parts and labor involved.

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