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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.

Backfiring

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.

Stalling problems

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.

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  • Tips for a Long-Lasting Nissan 350Z Ignition Coil

    With all the high-power voltage that runs through your Nissan 350Z ignition coil, it's such a wonder how this component remains reliable. However, no matter how tough your ignition coil is, excessive use and lack of proper maintenance can still cause it to fail. To guarantee the longest possible life from your ignition coil, here are a few helpful tips:


    Ensure that your spark plugs are properly gapped.


    Proper spark plug gapping is the key to avoiding overheated ignition coils. A large spark plug gap would require more voltage from your ignition coil which results to an overheated ignition system. Remember to adjust your spark plug gap when replacing your spark plugs even if your new spark plugs are already pre-gapped. Adjust the spark plug gap after replacing or cleaning your ignition coil as well.


    Visually inspect your ignition coil for any signs of damage.


    A visual inspection of the ignition coil can help you tell whether the component is becoming too worn out. Be sure to look out for hairline cracks and excessive rusting on your ignition coil; these would require your coil to be replaced. Pay close attention to your ignition coil's valve seals as well. Defective seals can shorten the lifespan of your ignition coil, so replace them as soon as they get worn out.


    Check your ignition coil's ohm resistance.


    Routinely testing your ignition coil's resistance with an ohmmeter or multimeter helps you diagnose problems with your ignition coil and other related components as soon as possible. A properly functioning ignition coil would have a primary resistance of 0.4 to 2.0 ohms and a secondary resistance of 6,000 to 15,000 ohms. If your ignition coil's resistance falls beyond these figures, then you have a defective ignition coil.


    Keep the ignition coil as clean as possible.


    Since ignition coils are small and tightly packed, cleaning them can be a bit of challenge. Try using a compressed air blower to get rid of some rust, dirt, and other debris inside the coil. Be careful when using electrical cleaners on this component, since they might just cause further damage to your ignition coil.