What happens when an ignition control module fails?
Typically, when an ignition control module of this type fails it would be one of the three drivers (transistors) within it that controls a specific ignition coil giving up. Should this occur, the other two ignition coils would still function and the engine would run roughly on four cylinders instead of six.
Is there a spark in the ignition module?
There is no spark coming out of any of the ignition coils sitting on top of the ignition module. You may have taken your ignition control module (ICM) to Auto Zone to test it and the friendly boys in orange say it’s good, yet the vehicle will not start (all major auto parts stores such as O’Reilly, Pepboys, etc., test ignition modules for free).
What kind of signal does the ignition module need?
OK, moving on along… for the ignition module to create this Switching signal, it needs to receive a C ran k shaft P osition (CKP) sensor signal (this signal is usually referred to as the Triggering signal and in GM service literature it’s known as the 3X or 7X CKP signal).
How does the ignition control module work on a LeSabre?
Answer: Your ignition control module manages your V-6 LeSabre’s three ignition coils. Each ignition coil makes a spark for two companion cylinders in what’s called a waste spark ignition system. Each time one of the coils fires, two spark plugs receive a spark.
How to tell if you have a bad ignition control module?
If it determines the ignition module has caused a problem with the system, it will turn on the check engine light. 2. Engine is misfiring or running rough: An engine misfire results from incomplete combustion. A faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough.
What happens when an ignition module overheats?
Ignition modules that are overheating will soon completely cease to function and in the meantime can cause cause electrical shorts, engine stuttering, lower gas mileage, power loss, stalling, and gasoline odors in the exhaust.
When does an ignition module need to be replaced?
If the light blinks, the module is good. If the light is blank or constant, the module is bad. Before you attempt to replace the control module, you must rule out other ignition system components. The module is expensive and replacing it is a laborious process. Check the ignition coil for a spark.
Why are Ford ignition module problems can cause a no start?
Although the ignition module is a common failure it’s not the only thing that can go wrong with an old Ford. This article highlights two of the most common problems with the ignition system. Again these are a failed module or defective ignition coil.