Nissan 350Z Ignition Coil
Signs and Symptoms of Nissan 350Z Ignition Coil Failure
If your Nissan 350Z ignition coil fails, you will experience a wide range of problems from a stalling engine to a car that won't even start at all. To help you diagnose and solve your ignition coil troubles, here are some of the most common symptoms of a defective ignition coil:
Engine misfire and bad fuel economy
Have you been getting much less mileage from your fuel? Does your vehicle jerk or lose power at random moments? If you answered yes to the previous questions, there's a big chance that your ignition coil is starting to show signs of wear. A spark check can easily tell you if your ignition coil is going bad. Bright blue sparks signal a good ignition coil, while weak orange sparks mean that your ignition coil needs to be replaced.
Another dangerous sign of an ignition coil gone bad is backfiring that occurs in the exhaust pipe. Because your ignition coil is generating less power, more fuel is being used up by your system. The backfire occurs when the unused fuel from this process is emitted through the exhaust pipe. Backfires caused by faulty ignition coils are also characterized by black smoke and the smell of gasoline coming from your exhaust system.
An engine that shuts off while idling is a telltale sign that your ignition coil has been functioning intermittently. Your ignition coil normally sends out sparks continuously to keep your engine running. However, a bad ignition coil tends to send out these sparks irregularly resulting to vehicle stalling. Try bench-testing your ignition coil with an ohmmeter or a multimeter to check for proper resistance. A good ignition coil usually has a resistance of 12 volts; 6 volts if it is a ballast ignition coil.
Engine cranks but won't start
One of the most noticeable symptoms of total ignition coil failure is a no-start, no-spark condition. If you hear your engine crank but your car still won't start, your ignition coil was probably blown due to overheating and will definitely have to be replaced. Since spark plugs with a too large gap are the most common culprits of ignition coil overheating, make sure that your spark plugs are gapped properly after replacing your ignition coil.