When a car begins to stall or is otherwise difficult to start, several potential problems come to mind. Is it the battery? Did the fuel line break? Are the spark plugs faulty? In reality, the ignition module may be broken, an issue often overlooked and misunderstood. For most drivers, the best solution is to take their vehicle into a repair garage to have it tested by a mechanic.
Your Ignition Module's Operation
Basically, an ignition module is a device that transfers a signal from the distributor to the ignition coil when the key is turned, essentially acting as a mediator.
A distributor is a device that rotates the firing of spark plugs in the right firing order, passing on the voltage generated by the ignition coil. The assembly consists of an insulated rotor mounted on the inside of the distributor cap; the rotor is spun by a gear from the camshaft, thereby synchronizing it with the engine movement.
The ignition coil is an induction coil that magnifies the standard 12V output of a car battery up to the several thousand volt range required by the spark plugs. Depending on the type of car you're driving, one coil may serve multiple cylinders, increasing the overall reliability.
Simple Diagnostics
In order to accurately determine if the module is at fault, it needs to be tested beforehand. For the do-it-yourself mechanic, several tools are available on the market for ignition module testing. However, these devices can be very expensive, not to mention intimidating for the novice grease monkey.
As noted above, a better solution is to have the car tested by a certified mechanic. Not only can the mechanic determine whether or not the module is malfunctioning, but can point out other possible issues in the event of an inconclusive diagnosis.
Procedure For Replacing The Unit
If the module needs to be replaced, several tools are necessary. You'll need bright overhead lighting, shop rags, pliers, wrenches, screwdrivers, and the vehicle's service or owner's manual. The first step in removing the old assembly is to disconnect the battery. Second, locate the unit with the manual, remove the screws, and disconnect the wires.
Next, remove any parts that prohibit access to the module and carefully set them aside so you can replace them easily later. After this step, remove any brackets and screws, and take out the old assembly.
To install the new ignition, just repeat the removal process in reverse: mount it with the brackets and screws, reinstall the surrounding parts, and then reconnect the device to the electrical system. After all of the stray tools and parts are clear, reconnect the battery and start the engine in order to test your work.
The Value Of A Mechanic
In truth, the process of replacing this part isn't complicated. Given enough attention to detail, most people who have done minor work on their vehicles can perform the removal and installation without a problem. That said, if you have never worked on your car, or feel uncomfortable about performing the job, have a trained auto technician do it for you.
