Quote Originally Posted by t2erns View Post
to pass the emission you must determine where it will be likely to fail, what i mean is dapat magpa exhaust analyzer ka muna to know which one is failing so you can address it beforehand. of course there's some tips like dapat mainit ang engine mo before taking the emission test
If you want a legal way, sangayon ako kay sir t2erns kaya konting dagdag na lang ng suggestion. Before taking your car in the emission testing center, complete tune up muna ng engine like palit ng spark plugs, linis distributor cap and rotor, contact point, filters, oil and adjust ng ignition timing kung kailangan.
Then the most important is while technician doing a test for your car ask him or hingi ng explanation kung bakit pass or failed. If failed get the result and show it to your mechanic.
If your car failed in HC (hydrocarbon) Any chemical compound made up of hydrogen and carbon. A major pollutant formed by the engine as a byproduct of combustion. Its possible you have a bad ignition system. In one words it is the "unburned fuel". But if your car failed in CO (carbon monoxide) A deadly, colorless, odorless, and tasteless gas found in the engine exhaust. Toxic even in relatively small concentrations. Formed by incomplete burning of hydrocarbons. Thus at its greatest with a rich mixture. So its need adjustment of the carburetor. It is between the air fuel mixture and idle. The technician can adjust it for you just tell them that your mechanic do not have a gas analyser. Yun lang kasi ang madalas na dahilan bakit maraming sasakyan na pabalik balik at ilang beses na bumabagsak. Because the carburetor have an ideal ratio of 14.7:1 to meet the standard level of CO in emission. Gas analyser lang nakakakita nito. Good luck.