The number one reason that ignition modules go bad is because of heat. On most of the cars that have a recurring problem with this, they have the original distributor in the car. As the distributor ages and wears, the bushing in the shaft goes goes bad and starts to cause excessive heat.

How do you know if your ignition control module is bad?

Signs of a Bad Ignition Module Acceleration Issues. The vehicle may shake, vibrate or jerk when the gas pedal is pressed. There may be hesitation or lack of power during increases in speed. Temperature Problems. A faulty ignition module can cause a vehicle to overheat. No Power. The engine may turn over without starting.

What happens when an ignition module goes bad?

a faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. the engine may also run well at low speed, but won’t accelerate well. 3. stalling: a failing ignition module can occasionally prevent the engine from getting spark, causing it to stall.