NGK shows how to fault diagnose different types of ignition coils

São Paulo, fevereiro de 2025 - During the operation of the car,
Several factors can affect the performance of the ignition system. Among the
Main, stand out: Battery with low charge, Alternator Problems,
wiring harness or compromised connections, Grounding or power supply
Inadequate, and injection or ignition module failures, for more vehicles
Old. These elements, alone or together, can harm the
Vehicle operation, especially the ignition system.
In the event of coil problems, The type of component can influence the
Fault identification. For these situations, and NGK, brand of Niterra
Specialized in components for ignition systems, offers guidance
on tests on different coil models to facilitate the identification of
defect
1 - Coils without attached module: The procedures include the measurement of the
Resistance of primary and secondary, the measurement of the current and voltage of
feeding, in addition to checking the voltage of the secondary, which corresponds to the
Coil output.
2- Coils with ignition module attached: in this case, you
Procedures include measuring resistance, when it is accessible, a
Checking the supply voltage, of the current and the command signal, well
such as measuring secondary voltage and return signal.
Changing the coil is simple, but failures in diagnosis can compromise
Its durability. The main recommendation is to identify the root cause of the
Problem before installing a new coil.
"In both cases, It is essential to perform a visual inspection in order to search for
Signs of oxidation, Terminal drying, Broken, Breaks, or problems
Thermal, as resin melting", afirma Hiromori Mori, consultant
Niterra technical assistance.

Problems beyond the coils
Beyond the reels, Spark plugs and ignition wires also require maintenance
according to the recommendations of the automakers. Spark plug cables, Responsible
by conducting the electric current from the coil to the candles, are essential for the
motor. Failures in them can cause difficulties in the match, Accelerations
Irregular, Increased fuel consumption, pollutant emissions and
soaking of the candles, due to dryness, oxidation and increased
resistance, caused by the time of use and heating of the cables. For
Avoid these problems, é necessário substituir os cabos a cada 3 anos ou
60.000 km, what happens first.
When component replacement is necessary, NGK offers a
Complete and high quality line of ignition coils, in addition to other items
important for the operation of the system, like spark plugs and ignition cables,
all available for the aftermarket.07