Ameer Randolph
There are several fuel additives on the market that claim to improve your car's emissions, but opinions vary on their effectiveness. Some people swear by them, while others argue that they have never needed to use a fuel additive and that there are other ways to ensure your car passes its emissions test. One such way is to ensure your gas cap is tight enough to prevent fuel vapors from escaping into the air. CRC Guaranteed To Pass Emissions System Cleaner is one such additive that has been trusted for over 25 years and is guaranteed to help your car pass its emissions test. It removes harmful carbon deposits from fuel injectors, intake valves, and combustion chambers, reducing carbon monoxide, hydrocarbons, and nitrogen oxide emissions.
| Characteristics | Values |
|---|---|
| Product | CRC Guaranteed To Pass Emissions System Cleaner |
| Product Features | Removes harmful carbon deposits from fuel injectors, intake valves, and combustion chambers |
| Use | Add to half-full gas tank every 3,000 miles |
| Benefits | Reduces carbon monoxide, hydrocarbons, and nitrogen oxide emissions; restores performance of the entire fuel system; increases start and acceleration response time; saves gas by increasing MPG; clears check engine light |
| Guarantee | Guaranteed to pass a smog test or double your money back |
| Other Options | Add acetone to the gas tank; use premium 91 octane fuel |
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What You'll Learn
Carbon deposit removal
Carbon deposits, if allowed to accumulate, can cause significant issues for your engine's performance and safety. Engine decarbonisation, or carbon cleaning, is a process that removes sooty carbon deposits from inside your engine, improving performance. This can be done by a trained professional, who may directly inject a solvent into your engine to dissolve the carbon deposits. Alternatively, you can purchase an additive to pour into your gas tank, which will clean out areas of the engine such as the fuel injector ports, intake valves, and the combustion chamber.
There are a variety of products available to dissolve carbon deposits, though many can only be used by trained mechanics. These include solvents that can be applied directly to the carbon deposits or poured into your fuel tank. Using refined fuel can also help, as the higher temperatures and cleaner-burning fuel will burn off any soot buildup.
If you are looking for a more manual approach, you can disassemble your engine and clean every nook and cranny. This method, however, requires specialist equipment and a large working area, so it is recommended to ask an expert for help. Additionally, some recommend driving your car hard or on the highway to flush out carbon deposits, though others suggest this will have little impact.
For direct fuel injection engines, you may need to take your car to a shop to have carbon deposits removed. You can also use a product like CRC Turbo and Intake Valve Cleaner, which you would squirt into your engine every 10,000 miles. However, with modern cars, this may be unnecessary, and it is more important to use top-tier gasoline and have your oil changed regularly.
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Gas cap pressure checks
A gas cap that is not sealing properly can cause a check engine light to come on. This can be due to a faulty gas cap seal or gasket, which helps maintain vacuum pressure inside the gas tank. When damaged, these components can leak pressure, leading to a check engine light illumination. Gaskets can roll over, fall off, break, crack, or split, creating opportunities for leaks. Sometimes, the gas cap may appear to be clicked and snug, but it never seals properly.
To diagnose a faulty gas cap, you can perform a leak test using a gas cap pressure test system, such as the Waekon FPT2600E Fuel Cap Pressure Test System. This handheld tester electronically checks the fuel cap's ability to hold pressure. It features bright LEDs that indicate "NO LEAK," "PASS," or "FAIL" test results within seconds, providing clear feedback on the gas cap's condition.
If your gas cap fails the leak test, you may need to replace it with a new one. Gas cap replacement is generally a quick and easy process, involving the removal of the old cap and the installation of a new, properly fitting cap. It is important to ensure that you have the correct gas cap for your vehicle, as they can vary in shape and size.
By performing regular gas cap pressure checks and addressing any issues, you can help maintain the proper functioning of your vehicle's fuel system and ensure that your car complies with emissions standards. A properly sealed gas cap helps maintain the pressure in the fuel tank, contributing to efficient engine performance and reducing harmful emissions. Therefore, gas cap pressure checks are an important aspect of vehicle maintenance and emissions compliance.
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On-board diagnostics tests
On-board diagnostics (OBD) tests are designed to monitor a vehicle's emissions system and key engine components. The OBD system, composed of a computer, can usually detect malfunctions or deterioration before the driver becomes aware, thereby preventing costly repairs.
The OBD system was made mandatory by the US EPA for all cars and light-duty trucks manufactured from 1996 onwards. The system is designed to alert drivers when a component in the engine management or emissions systems is malfunctioning or deteriorating. This early detection allows for timely repairs, preventing more extensive damage to components such as the catalytic converter.
The OBDII emissions test for these 1996 and newer vehicles consists of several checks. The first check is the Malfunction Indicator Lamp (MIL) or Service Engine Soon Light, and Check Engine Light check. This is considered the bulb check portion of the test. The light must come on when the ignition is turned on and turn off when the engine is started. If the light is not working, the vehicle will fail the test as it is meant to alert the driver of a problem with the OBDII system.
The second check is the MIL Command Status and Diagnostic Trouble Codes (DTC) check. If the MIL command status is on, it indicates a problem with the OBDII system, and the vehicle's Powertrain Control Module (PCM) is commanding the MIL to turn on. The third check is the OBDII (Non-Continuous) Readiness Monitors check, which are like self-checks of each emissions component within the system.
If a vehicle fails the OBD test, the owner will receive a test report specifying the reason for the failure, and repairs must be made by a qualified technician to register the vehicle.
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Inspection and maintenance tests
Vehicle inspection and maintenance programs (I/M) are designed to improve air quality by identifying cars and trucks with high emissions that may need repairs. These programs are implemented by state and local government agencies, and requirements can vary depending on the area. For example, some states mandate both an inspection and a smog check, while others may require only one or neither. Electric cars are typically exempt from smog tests as they do not produce tailpipe emissions.
The 1990 Amendments to the Clean Air Act established I/M requirements for several areas across the country. These programs help identify vehicles that exceed emission limits and require owners to make necessary repairs to comply with legal emission standards. The Environmental Protection Agency (EPA) has developed policy and technical guidance to assist State and Local I/M Agencies with program implementation, annual reporting, performance standard modeling, and biennial program evaluation.
The EPA provides resources such as the "Overview of Vehicle Inspection and Maintenance Programs" document, which offers information on where I/M programs are mandatory and the specifics of I/M testing. Another document, "Overview of Vehicle Repair and Replacement Assistance Programs," outlines how certain state and local I/M programs offer financial assistance for vehicle repairs or replacements, catering to low-income motorists.
The EPA also provides specific guidance for On-Board Diagnostic (OBD) System Checks as part of the I/M program. This includes recommendations for effective OBD-I/M implementation, addressing OBD readiness-related issues, and test procedures such as the Acceleration Simulation Mode (ASM) test.
It is important to note that the frequency of emissions testing may depend on the age of the vehicle. For instance, in Vermont, cars 16 years old or newer must undergo annual emissions inspections and maintenance checks. In contrast, in Northern Virginia, emissions tests are required every other year for the most populated areas.
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Premium 91 octane fuel
Premium 91-octane fuel is the highest-octane fuel available, with levels ranging from 91 to 94. It is designed for vehicles that require or recommend higher-octane gasoline, such as those with higher compression ratios or engines that use supercharging or turbocharging. Using the correct octane fuel recommended by the manufacturer is essential for maintaining engine performance and the emissions control system.
While some vehicles may require premium 91-octane fuel, others may be designed to run on regular unleaded gasoline with an octane rating of 87. Using fuel with an octane level lower than recommended can reduce engine performance and cause damage to the engine over time. However, if a vehicle is designed for regular-octane gas, it can safely use higher-grade gasoline without any significant benefits or drawbacks under normal driving conditions.
Higher octane fuels, such as premium 91-octane, may offer improved performance and reduced carbon dioxide (CO2) emissions during severe duty operations, such as towing heavy loads or driving in hot weather. The fuel components that boost octane are generally more expensive to produce, and the cost increase may outweigh the fuel savings. However, for some consumers, the potential reduction in CO2 emissions and petroleum usage may be more important than the cost difference.
It is worth noting that the octane rating of gasoline can vary slightly depending on the season, with summer blends having a lower volatility to reduce evaporation and offset smog and emissions. Additionally, ethanol, which has a much higher octane rating, is often blended with gasoline in the US to boost its octane rating.
In summary, while premium 91-octane fuel is the highest-octane option available, the choice of fuel depends on the specific requirements of the vehicle. Following the manufacturer's guidelines in the owner's manual is crucial to ensure optimal performance, maintain the emissions control system, and avoid potential engine damage.
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Frequently asked questions
CRC Guaranteed To Pass Emissions System Cleaner is a trusted product that has been used for over 25 years. It removes harmful carbon deposits from fuel injectors, intake valves, and combustion chambers. It also reduces carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxide (NOx) emissions.
It is recommended to use an emissions system cleaner four times a year for optimal results.
Ensure your gas cap is tight enough to prevent fuel vapors from escaping into the air. Check for leaks in your exhaust manifold/header as this can mess up the fuel mixture.
You can try putting premium 91 octane fuel in your car, especially if it is an older model.
A clean fuel system can lead to easier starts, faster acceleration, and better airflow. It can also save gas by increasing your miles per gallon (MPG).
