The Buick Enclave and Chevrolet Traverse models from 2008-2017 have been reliable family-friendly SUVs, but some owners have encountered issues with catalytic converter performance and premature failure. Catalytic converters play a critical role in reducing harmful emissions and maintaining overall engine health. However, several factors, such as carbon buildup, fuel mixture imbalances, and ignition system faults, can lead to catalytic converter degradation in these models.
Here, we’ll discuss some common catalytic converter issues highlighted in recent Technical Service Bulletins (TSBs) and provide recommended maintenance steps to extend the life of your catalytic converter and improve overall vehicle performance.
Understanding Catalytic Converter Issues in the Enclave and Traverse
Catalytic converters in these Buick Enclave and Chevrolet Traverse models are prone to issues due to carbon buildup and fuel mixture irregularities. This combination can lead to incomplete combustion, causing unburned fuel to enter the exhaust system. When excess fuel reaches the catalytic converter, it can quickly cause overheating and clogging, ultimately leading to converter failure and costly repairs.
Key TSBs addressing these issues include:
- TSB #PIP5232C
- TSB #16-NA-383
- TSB #PIP5549A
Each of these TSBs includes recommendations for maintenance and specific actions to help prevent catalytic converter problems. Let’s dive into the most important recommended steps.
Recommended Actions to Maintain Catalytic Converter Health
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Check Ignition Coil Grounds on the Engine Block
Proper grounding of the ignition coils is essential for consistent ignition performance. When ignition coil grounds are loose or improperly secured, it can lead to misfires and incomplete combustion, which directly impact the catalytic converter. Misfiring allows unburned fuel to pass into the exhaust system, leading to catalytic converter overheating and clogging.
During routine maintenance, check the ignition coil grounds to ensure they are tightly secured to the engine block. If you experience any rough idle or lack of engine power, verifying the coil grounds should be one of the first steps.
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Use Run Rite Sledgehammer (Decarbonizer) to Clean the Combustion Chamber
Carbon buildup is one of the primary culprits behind catalytic converter issues in these models. As carbon accumulates in the combustion chamber, it can affect combustion efficiency, leading to unburned fuel entering the exhaust system. Using a product like Run Rite Sledgehammer (Decarbonizer) to remove carbon from the combustion chamber can restore combustion efficiency, improving performance and reducing emissions.
Decarbonizing the combustion chamber is particularly important for vehicles with higher mileage, as carbon buildup tends to increase over time. By keeping carbon deposits under control, you can reduce strain on the catalytic converter and extend its lifespan.
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Check Fuel Trims at Idle
Fuel trims are a measure of how much the engine computer is adjusting the air-fuel mixture. Ideally, fuel trims at idle should be close to zero. If the fuel trims exceed 5%, this may indicate a problem with the air-fuel balance, which can lead to excess fuel entering the exhaust system and straining the catalytic converter.
High fuel trims may point to intake or purge system leaks, which can allow unmetered air to enter the engine. Use a smoke machine to test for leaks in the intake and purge system. If you detect leaks, address them promptly to prevent further damage to the catalytic converter and improve fuel efficiency.
Additional Tips for Prolonging Catalytic Converter Life
To supplement these recommended actions, consider the following best practices for catalytic converter health:
- Use High-Quality Fuel and Oil: Low-quality fuel or oil can contribute to carbon buildup, leading to inefficient combustion. Regular oil changes and the use of quality fuel can help keep the engine clean and reduce deposits.
- Avoid Extended Idling and Stop-and-Go Traffic: Prolonged idling and stop-and-go traffic can create fuel-rich conditions, increasing the likelihood of unburned fuel entering the exhaust system. Whenever possible, limit idle time to reduce strain on the catalytic converter.
- Repair Engine Issues Promptly: If you experience symptoms like rough idling, hesitation, or reduced power, don’t delay repairs. Addressing minor engine issues early on can prevent significant damage to the catalytic converter.
Final Thoughts
While the catalytic converter issues in the Buick Enclave and Chevrolet Traverse from 2008-2017 can be frustrating, regular maintenance and attention to these recommended actions can go a long way in preventing premature failure. By keeping your ignition coil grounds secure, decarbonizing the combustion chamber, and monitoring fuel trims at idle, you can help ensure the health and longevity of your catalytic converter.