Testing Tips
Your vehicle can be tested at one of 175 fixed/semi-fixed/mobile testing stations around the country. Follow the simple procedure below to ensure a pleasant and smooth experience:
- Run your vehicle to its peak operating temperature. We advise at least 25-minutes of moderate driving to achieve this.
- Once you arrive at the DriveGreen testing station, pay your fees and collect receipt that is issued.
- Keep your vehicle’s engine running as you proceed through the queue towards testing booth.
- Present the receipt to the Vehicle Inspector.
- At this stage, you may either move to the Passenger’s Seat or choose to wait in the designated waiting area until your vehicle completes all tests.
- You may view the vehicle’s progress through the remote monitor.
- At the conclusion of the testing process, you will be advised of the emission compliance status of your vehicle.
- If your vehicle passed the test, you will be issued with a Sri Lanka Vehicle Emission Test Certificate, which you must present when renewing your Annual Revenue License.
If you have any questions about the Testing and Certification process, please Contact Us.
- Once in line for testing, turn off all accessories (air conditioner, lights, wipers, heater, radio, etc.)
- Clean or replace air filter & fuel filter.
- Inspect and clean or replace spark plugs & wires,
- Adjust air-fuel ratio.
- Inspect and adjust the choke.
- Check EGR valve, Lambda sensor for proper installation and functional operation.
- Check vacuum hoses for cracks, leaks or blockage and repair or replace as required.
- Repair or replace system parts as required.
THESE STEPS ARE GUIDANCE ONLY
- Run least 30 min before the test in a reasonable speed to heat your engine. Until your vehicle reaches normal operating temperature, it emits excess pollutants.
- To remove carbon particles in the exhaust system. Flush your diesel vehicle exhaust system three times by pressing the accelerator your vehicle rapidly few times.
- Turn off all accessories when testing. (Air conditioner, lights, wipers, heater, radio, etc.)
- While in line, do not shut off engine. This helps to keep the engine at normal operating temperature.
- Clean or replace air filter & fuel filter.
- Clean the silencer.
- Check the injector nozzle condition & mismatch.
- Check for fuel injector fouling or mismatch and repair or replace as required.
- Adjust or repair turbocharger.
- Examine governor, fuel rack and injector timing for possible adjustment.
- Check the fuel pump.
- Repair or replace system parts as required.
” These steps are provided only as a reference/guidance.”
Reasons For Fail Four Stroke Motor Cycles, Three-Wheels, Cars
1. Air Cleaner.
- Clogged Air cleaner.
- Used for long period than recommended time/ mileage.
- Inappropriate Air cleaners. (ex: Diesel vehicle’s air cleaner used for petrol vehicle)
- Plenty of oil in air cleaner element. ( for Bikes and 3-wheelers)
- Leaks in the induction hoses or ducts. (for EFI vehicles)
2. Spark Plug.
- Used for long period than recommended time/mileage.
- Not using manufacturer recommended model of spark plug.
- Damaged spark plug/s.
- Not properly tightened Spark Plug/s. (Specially for cars)
- Bad Plug top/Plug wires.
3. Carburetor/Fuel Injection system.
- Incorrect modification of the carburetor. (ex: incorrect jets sizes, jet types)
- Incorrect adjustments. (Air, fuel, floater level)
- Carburetors with Clogged ports, jets.
- Improperly seated carburetor. (Packing, loosen screws, rubber boot)
- Defective Sensors. (ex: MAP sensor, air flow/mass Sensor, Lambda sensors )
- Defective actuators. (ex: solenoids, Stepper motors)
- Clogged fuel injectors. ( Only for EFI vehicles)
- Blocked throttle-body, air measurement lines, and actuator air lines. (Only for EFI vehicles)
4. Ignition System.
- Defective Ignition coil/ Pickup coil.
- Defective C-B points/CDI unit.
- Defective high-tension wires.
5. Other
- Worn Engine.
- Excessive oil added to petrol.( For 2-stroke vehicles only)
- Excessive Engine oil level.
- Clogged PCV (Positive Crank-case Ventilation) valve.
- Defective EGR (Exhaust Gas Recirculation Valve) Valve.
- Improper sealed valve seats, Gasket.
- Incorrect valve/ignition timing.
- Low fuel quality.
- Incorrect Silencer modifications.