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www.answers.com/Q/What_are_the_symptoms_of_defective...

A bad ignition module is usually characterized by several frustrating symptoms. A classic example is when the engine will start, but when it gets hot, the ignition module's electrical properties ...

www.reference.com/vehicles/symptoms-defective-ignition...

The most common symptoms of a defective ignition module are overheating, unexpected stalling or inability to start the vehicle. Replacing the module is an expensive process, and checking the circuits, electrical connections and temperature issues within the first or second occurrence of stalling can save time and money.

www.reference.com/vehicles/signs-bad-ignition-module-a...

Symptoms of a bad ignition module are sudden engine stalling or power loss while the car is in motion, engine stuttering accompanied by a smell of gasoline and an inability to restart the engine following a stall. Decreased gas mileage is also a sign of a compromised ignition module. Ignition module failure can be caused when the unit overheats.

www.quora.com/What-are-the-symptoms-of-having-a-bad...

The most common symptom of a bad ignition module is that the engine dies and won’t restart. Often it will often restart once the engine and module cool off. Ignition modules are a large transistor that switches the current to the ignition coil on and off just like points did in older cars.

itstillruns.com/signs-bad-ignition-module-6827646.html

A vehicle's ignition module controls the timing and functioning of spark plugs. The vehicle's performance is affected if the sparks plugs misfire or stop producing a spark. There are several signs that indicate an ignition module is bad.

www.yourmechanic.com/article/symptoms-of-a-bad-or-failing...

Usually a bad or failing ESC module will produce a few symptoms that can alert the driver of a potential issue that should be serviced. 1. Engine performance issues. One of the first symptoms of a problem with the ignition module are engine performance issues. If the ignition module fails or has any problems it can lead to performance issues ...

www.doityourself.com/stry/2-symptoms-of-a-deteriorating...

2 Symptoms of a Deteriorating Ignition Module The ignition module of your vehicle is the heart of your entire ignition system. Its two main roles are to create a spark strong enough to ignite the air/fuel mixture for combustion and to control the timing of the spark plugs by opening and closing the ignition coil ground circuit.

cartreatments.com/bad-ignition-coil-symptoms

Symptoms of a Bad Ignition Coil. If a vehicle is behaving intermittently and is giving its driver some trouble in a smooth driving, then it could indicate that the ignition coil of that vehicle has gone bad. The failed or weak ignition coil symptoms may vary depending on the severity of the ignition coil failure.

www.fixmyoldride.com/ignition-module-failure.html

Ignition module failure is no joke because it often leaves you stranded. The complaint is the engine cranks normally, but does not start. The cause of an ignition control module failure is often associated with age and damage from heat buildup. The correction for this issue becomes the replacement of the failed component.

www.youtube.com/watch?v=NHOZsMIoX5g

If your GM car is stumbling at WOT, or appears to be "missing" it could be your ignition control module. I was replacing parts left and right (car needed them anyway) but after shooting this video ...