My local Mazda dealership mechanics couldn't figure this problem out. I've been experiencing misfires on the #3 cylinder for a couple years now. While the car was still under warranty, they would just replace spark plugs and coils, then the car would be fine for a time. I think the last year it was under warranty, I had it in 4 times for the exact same issue. They eventually swapped the #3 coil and plug with one of the other 3 in the car and the misfires continued on #3. Then they replaced the air intake, but it still happened again. The check engine light came on and #3 cylinder misfi
It sounds to me like you have a wire connector issue with the ignition coil pins. The male and female sides fit too loose and only make partial contact. After driving a while a small amount of corrosion forms in the connection and causes the misfire. As soon as you disconnect and reconnect it the connection was made again so it would work for a while. The coil may have failed due to excessive resistance from the corrosion in the connector, and this is most likely what has happened now. I suggest you have the vehicle scanned again. If the failure was #3, then replace the coil and connector. You should also try and put stabilant 22 in all the coil connectors before reconnecting them. The stabilant 22 will stop any corrosion and help keep a full connection. A certified mechanic from YourMechanic can inspect your misfiring issue at your home or office.
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Common reasons for this to happen:
Faulty spark plugs or wires. Faulty ignition coil. Broken piston rings.
A malfunctioning ignition coil will cause your vehicle to misfire when you accelerate. In extreme cases, a misfire could cause your vehicle to shut down while you are driving. The misfire is a result of one of the cylinders fires incorrectly or not at all.
Sporty, speedy and easy on the eyes, your Mazda6 has all the makings of a masterful, yet functional, little sports car. See that its spark plugs get plenty of power by replacing that old, worn-out ignition coil with a new, custom Mazda6 ignition coil from AutoZone.
The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.
If left untreated, a cylinder misfire can lead to significant engine damage. Worse, if you experience a bad misfire while driving, it could result in an accident. This is why it`s important to treat engine misfires as soon as you detect them.
Once the engine is cranked, you should look for blue sparks along the spark plug gap. If you can see blue sparks, this proves your ignition coil is working correctly. If you don`t see blue sparks or you see orange sparks, this is a sign that there`s a problem with your ignition coil.
If the combustion cycle isn`t running smoothly, the engine won`t be as powerful and you`ll notice the difference in performance. If you notice that you`re stalling more frequently, or that the engine is sluggish when you press the gas pedal, it`s a good idea to get the ignition coil checked out.
The ignition coil on your car is supposed to last around 100,000 miles or more. There are a number of factors that can lead to this part become damaged prematurely. Most of the newer cars on the market have a hard plastic cover that is designed to protect the coil from damage.
The best part is, our Mazda 6 Ignition Coil products start from as little as $36.24.
While it is possible to drive with a faulty ignition coil in many cases, doing so for extended periods of time is never advised. An engine in this state will run at less than peak efficiency, often leading to intermittent stalling or starting difficulties.
Code P0351 is defined as “Ignition Coil `A` Primary/Secondary Circuit Malfunction.” It`s an OBD-II diagnostic trouble code (DTC) that indicates a fault with ignition coil `A` (a problem with the coil on cylinder #1 or its circuit).
To test for voltage output, connect a spark tester to the high-tension output terminal of the ignition coil. Then, crank the engine and observe the spark tester. If the spark is strong and consistent, the ignition coil is functioning correctly. However, if there`s no spark or a weak spark, the ignition coil is faulty.
Yes. While the damage may seem small initially, the longer you drive with a bad oxygen sensor, the worse the damage will become. Eventually, you may experience rough idling, poor acceleration, engine misfires, an illuminated check engine light, and failed emission tests.
Repairing a misfiring engine can be simple or complicated, depending on the reason it is misfiring. The most common causes of engine misfires are: worn spark plugs, weak fuel injector, vacuum leak, worn valve seals, carbon tracking, and no voltage at the coil.
The engine misfires. Once a timing chain is stretched and has lost its integrity, the chain may skip a gear and lose the necessary coordination leading to an engine misfire. Repeated misfires could indicate a timing chain issue and should be investigated.
What kills ignition coils is location; being mounted in one of the hottest, most vibration prone and dirtiest parts of the engine. Modern ignition coils are typically located between two camshafts on the valve cover and exposed to dirt and oil.
If an ignition coil is not working properly, your engine will likely misfire. A misfiring engine results in a jerking or sputtering feel when you are moving at normal speeds. When you stop, a misfire from a bad ignition coil may cause your vehicle to run roughly, vibrate or shake.
Vibrations can damage ignition coil windings and insulation causing shorts or breaks in the secondary windings. The overheating of ignition coils can hinder their ability to conduct electricity. Wear and tear is a common reason for ignition coils failing.
How Long Do Ignition Coils Last? Ignition coils generally last 80,000 to 100,000 miles. However, as with most vehicle components, certain conditions like the ones below may cause them to fail sooner.
In addition to being more reliable, coil packs are generally credited with providing more horsepower and torque than a common distributor. Because a coil pack generally creates a much more efficient spark, it also known to provide a slight fuel efficiency improvement over vehicles that use standard distributor caps.
If you have a faulty coil, it`s going to cost you between $200 and $300 on average to replace it, not to mention the frustration and downtime you`ll experience. Learn more about what an ignition coil is, what it does, ignition coil replacement cost, and how you can tell when it`s bad.
For some V6 engines (6 cylinder), the intake manifold has to be taken out to access the bad spark plug, taking the labor costs as high as $260-$320 for the vehicle. In total, spark plugs replacement can cost you anywhere from $100-$250 on the low end and $250-$500 on the high end (usually for a V6 engine).
The ignition coil on car is supposed to last around 100,000 miles or more. You will have reduced gas mileage when coil begins to go bad and becomes less able to transfer power. Your car requires more fuel to run, this means you will spend more money on gas than normal.
In this type of system, a four-cylinder engine has two coils, a six cylinder has three coils, and a V-8 has four coils. The coils are often mounted together in a coil pack, Figure 10-10.