How to Pass A Smoke
Emission Test
Give your precious vehicle a better chance of passing
a Smoke Emission (also referred to as smoke test or smoke check) when you apply
for registration. A well –maintained car, with all its systems in optimum condition,
is more likely to pass the test with flying colors.
Partially due
the economy, there is demand for the cheapest fuel –diesel-and with the low
cost of such fuel comes very high emission output. Through the clean Air Act,
the Philippine Land Transportation Office (LTO) has mandated “smoke emission
tests to be passed by vehicles running on diesel engines as part of
requirements for the renewal of the yearly vehicle registration. LTO has in operation motor vehicle inspection
centers to large transport groups, while private emission testing centers (PETC)
provide testing services to public transport vehicles, including private-owned
vehicles It is important to understand that smoke testing is a fundamental
process for the alleviation of health-threatening pollutants in the atmosphere.
EMISSION test programs verify that the car’s emission system is performing
properly.
RUNNING RIGHT
Never subject your vehicle to a smoke inspection if it does
not run right. Chances are that it will fall the smoke check. Seek professional
assistance first to save you time and money.
INFLATE TIRES
The technician may need to drive the
vehicle on a dynamometer which positions the car tires on rollers that allow
the engine to run of high speed s while it is stationary as a part of the smoke
test process. An even and correct tire pressure allows the vehicle to be driven
with greater stability and accuracy and the engine to maintain a steady and
constant load in torn, the improves the overall emission output.
TAKE
A DRIVE
Drive your vehicles for at least 25
minutes prior to arriving at the smoke inspection station. Experts say that
this will ensure that the vehicle is a adequately warmed up and is running at
its optimum level. The engine is a fuel burning machine, and a cold engine may
be your Achilles heel during the test. To ensure proper combustion it needs to
have sufficient time to warm up.
CHECK COOLANT AND GAS LEVELS
Make sure to fill your coolant tank
properly before the test less or air flows through the radiator to cool the
vehicles when it is tested at high speed while stationary or at an angle on a
dynamometer. Experts add that low gas level in the tank could expose the fuel
pump and put vapor in the fuel line, causing the car to fail the test.
Avoid rainy days-Some say that wet
tires can slip on the dynamometer and give a false reading that can cause smoke
check failure. Others on the other hand say the warm-up cycle of the test will
usually dry off the tires. Furthermore, extra humidity during rainy days results in lower emissions of some
pollutants.
CLEAR THAT “CHECK ENGINE “LIGHT
If the “check Engine” light is on your car will need
immediate engine repair, this means that it is an automatic smoke check failure.
Get a pre-test for a diagnosis and fix. Experts say that this is mostly due to
a faulty oxygen sensor, or at times before it fails, it does not properly regulate
the gas or air mixture.
CHANGE OIL
If it is needed
or close to your next oil change interval, change it. Every engine is specifically
designed to breathe fumes located in the oil compartment. Experts say that if
the oil is contaminated due to inadequate oil changes it could release
additional pollutants that may very well be your ticket to a failed inspection.
DO A TUNE-UP
Two weeks before the smoke test. Have
any required maintenance performed well before the smoke test. Most mechanics
disconnect the battery while doing a tune-up and this resets the cars on board computer.
The car then needs two weeks of driving to run all the diagnostic tests needed
to pass the vehicle test.
Smoke test can be a ceremonial hassle
for car owners and yet, there are simple steps they can take to tilt the odds
of passing a smoke check in their favor. There are a lot of necessary steps
they can accomplish before hand to ensure their precious set of wheels get a
clean health bill and registered. Here are the top tips we have gathered from
smoke check technicians to prepare your car for a smoke check.
AVOID RAINY DAYS
Some say that wet tires can slip on the dynamometer and give
a false reading that can cause smoke check failure. Others on the other hand
say the warm-up cycle of the test will usually dry off the tires. Furthermore, extra
humidity during rainy days results in lower emissions of some pollutants.
USE ADDITIVES
Fuel additives are normally poured into the gas tank during
refueling. It can be very helpful in lowering emission levels, improving
combustion, increasing overall engine performance and ultimately in passing the
smoke test. The mixture cleans carbon deposits within the engine’s intake and
exhaust paths, allowing for both fuel and air to flow freely within its
passages.
Some older cars that run poorly may have clogged fuel
injectors, say experts, and mixing an additive could clean the small openings
and help the cars pass the smoke test.

