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Testing Tips

Petrol Vehicles

  • 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 and the Lambda sensor for proper installation and functional operation.
  • Check vacuum hoses for cracks, leakage or blockage and repair or replace as required.
  • Repair or replace system parts as required.
  • Once in line for testing, turn off all accessories such as air conditioner, lights, wipers, heater, radio etc.
The above steps are provided only as a reference/guidance.

Diesel Vehicles

  • Clean or replace air filter & fuel filter.
  • Clean the silencer.
  • Check the injector nozzle condition for mismatches.
  • Check for fuel injector fouling or mismatch and repair or replace as required.
  • Adjust or repair the turbocharger.
  • Examine governor, fuel rack and injector timing for possible adjustment.
  • Check the condition of fuel pump
  • Repair or replace system parts as required.
  • Run at least 30 min before the test at a reasonable speed to heat your engine. Until your vehicle reaches optimal 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 a few times rapidly.
  • Once in line for testing, turn off all accessories such as air conditioner, lights, wipers, heater, radio etc.
  • While in line, do not shut off the engine. This helps keep the engine at the normal operating temperature.
These steps are provided only as a reference/guidance.
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