Causes of ISC Not Functioning
With a vehicle, one can easily go to a place. But what if suddenly the vehicle's engine cannot operate due to a malfunctioning ISC?
When checking the ISC end of the vehicle's engine, you will find a pintle that plays a role in regulating the amount of air supply entering the engine in idle position.
Unfortunately, the pintle is mechanical, so problems such as jamming and inability to operate due to corrosion or dirt buildup are often encountered.
Having an important role in the vehicle's operation, imagine what would happen when this component jams and does not work? It could potentially affect the air supply flowing to the combustion chamber when the vehicle is idling.
If the pintle jams in a closed position, the amount of air supply entering causes the rpm to drop and vice versa.
Read also: Understanding the Car Fuel Indicator Scheme and 4 Common Problems
Causes of ISC Malfunction
Based on the brief explanation, it can be concluded that a damaged pintle will be one of the many causes of sudden ISC malfunction.
Another sign indicating that the ISC is damaged is a worn pintle tip. The cause of damage to the pintle generally occurs due to prolonged usage.
As it ages, the pintle will not work optimally like new, leading to damage in several parts. Its declining durability is the main reason for the damage to the pintle. When the condition worsens, it is feared that it could cause air leaks.
A leaking pintle can certainly affect the performance of other engine components, as the vehicle's rpm becomes uncontrollable due to sudden fluctuations even when the driver is not pressing the vehicle's pedal. If such a condition is found, immediately take your vehicle to the nearest service center.
If you are still unsure about the cause of the ISC malfunction, please check with the help of an ohmmeter. This is necessary because generally, vehicles will be equipped with coils with a certain resistance value. The resistance value will regulate how much the pintle opens to ensure that the required air supply is met during idling.
