Do you find your Jaguar hesitating to start or stalling when you are idle? These may be symptoms of a faulty ignition coil. Ignition coils are responsible for enhancing the voltage of the electrical energy from your car’s battery to produce the required voltage for a spark in spark plugs. This spark ignites the air-fuel mixture in your engine’s cylinders to keep it running. When they begin to go bad, it results in several performance problems that make your car less reliable and enjoyable to drive.
How To Diagnose Jaguar Ignition Coil Failure
Perform a Visual Inspection
Before you can effectively diagnose an ignition coil problem, you have to look out for a few things during an inspection of the coil and other related components. Signs that are normally visible in the coil housing include cracks, burn marks, corrosion, and other signs of wear. Looseness, fraying, or corrosion in the wiring and connector that leads to the coil may affect the coil’s performance in your vehicle.
Use an OBD-II Scanner
To obtain the fault codes, you have to plug a recommended OBD-II scanner into your Jaguar’s diagnostic port. These include codes such as P030X, which is a random Cylinder Misfire, or P035X, which points out a problem with the Ignition coil circuit.
Check the Ignition Coil’s Resistance
Find the amount of electrical resistance in the ignition coil using a multimeter. You should check the voltage and current on both the primary and secondary circuits and then compare them with the Jaguar’s specifications. If the resistance is not within this range, the coil is probably bad, or the device is not functioning properly.
Swap Coils Between Cylinders
Take a faulty coil to another cylinder and observe if the misfire or the code is repeated in the cylinder to which the coil has been moved. If the problem follows it to the new cylinder, the coil is proven to cause the problem.
Inspect the Spark Plugs
Spark plugs that are worn or dirty can give similar symptoms to a bad ignition coil. Before checking this, turn the engine off, unplug the wires, and remove the spark plugs to check if they are worn out, fouled, or damaged. Sometimes, fixing the ignition coil problem is possible by merely replacing the plugs.
Replace Faulty Components
If a particular coil is deemed bad, then the bad coil should be replaced with a good OEM or compatible ignition coil. With vehicles with high mileage, it’s advisable to change all the coils simultaneously to prevent inconsistencies.
Test the System After Repairs
When you are finished replacing or repairing any part of the car, take the car for a test to confirm whether the issue has been resolved. Using an OBD-II scanner, delete any stored fault codes and notice signs of how the engine runs and the enhancements made.
How You Can Avoid Ignition Coil Failure
While it is impossible to eliminate ignition coil failures for good, it is always possible to avoid them through services. You should always go to a competent mechanic and always make sure you service your car as per the manufacturer’s standards. Ensure that oil or coolant does not leak on the ignition coils and that the technician fixes any leakages from either of the two liquids. Original equipment manufacturers or superior-quality aftermarket parts should only be used when performing a repair. Be keen on changes in your Jaguar and fix problems immediately.
Highlands Automotive Is The Best Service Center In Highlands For Jaguar Repairs
If you have noticed some signs of ignition coil failure in your Jaguar, do not hesitate to fix it. Welcome to Highlands Automotive, where we deal mainly with high-end cars such as Jaguars and help to keep them running optimally. When you come to our workshop in Highlands, NC, you’ll find experienced technicians equipped with state-of-the-art equipment to diagnose and solve any Jaguar problem. Whether you’re having issues with ignition coil failures or require regular servicing, we are available. Come to our shop or book an appointment today, and let us keep your Jaguar as smooth and powerful as you want it to be.