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An automobile's ignition control module is responsible for generating the spark that travels across the engine's spark plugs to start the vehicle. A defective ignition control module can significantly affect a vehicle's operation, ranging from diminished engine performance to components that overheat. A vehicle that produces signs of that the ignition control module is breaking down should be taken in for repairs before a driver finds himself or herself stranded.
Poor Engine Performance
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A faulty ignition control module throws off the engine's timing. This affects acceleration and the ability to control driving speeds. Drivers will experience a hesitation, shaking and a lack of power when the vehicle attempts to accelerate. This sign gradually worsens until the vehicle routinely misfires at high RPM, according to the automotive repair website AA1 Car.
Overheating
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A malfunctioning ignition control module also causes its components to overheat because of low voltage dispersal. A relay in the control module remains closed and causes voltage in the system to build up. As the current passes through the system, it will quickly overheat and shutdown the system. A vehicle with this problem may start, only to shut down minutes later.
No Start
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A failed ignition control module will keep the vehicle from starting. This will occur after repeated heat-related module shutdowns. Nothing will get the vehicle running again outside of a replacement control module, even if the engine sounds as though it might start.
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