In fact, if you’ve recently gotten your engine and battery looked at the “Check Engine” light may be all the proof you need that the spark plugs are an issue.Īnother great way to use the “Check Engine” light to determine the issue is by squaring it with a lot of the other symptoms on this list. While there are a lot of reasons a “Check Engine” light may come on, it shouldn’t be discounted as a sign there’s an issue with your spark plugs. This results in an inadequate amount of electrical power flowing, thus resulting in the engine not picking it up.Ĭhanging your spark plugs is one of the fastest and most immediate methods you can employ to fix this issue and get your engine running properly once again. “Engine Surging” generally happens due to cracked or broken wires outside of the insulation area. Engine SurgesĪnother sign you’re dealing with a bad spark plug is if your car sporadically “surges” while driving. However, it is an incredibly common reason and something worth considering the first time you start noticing this issue. If your car begins to slightly vibrate while driving or simply while sitting idly, you know there is a potential problem.Īs mentioned before, a spark plug issue may not be the reason for this for every person. The term “vibrate” while slightly odd, perfectly fits what is happening. Always check the spark plugs before everything else.Ī mechanic holding a new spark plug for replacement. Not only can this result in brief explosions coming from the exhaust, but it can also result in black smoke as well as a strong gasoline smell coming from your tailpipe. When there is more air in your engine than fuel, you can likely cause a small explosion to occur from the exhaust.įaulty spark plugs can result in improper igniting between the air and fuel blend. Your Engine BackfiresĪ backfiring engine is due to an imbalance between your fuel and your air. Don’t let this issue grow into something very dangerous for you and your car, especially since its fix is so small. The more often this happens, the more serious the situation is. The easiest way to know if your car is “misfiring” is to note whether it stops and starts while driving. This most often is the case as a result of incomplete engine combustion. Your Engine MisfiresĪ super obvious sign you are likely dealing with bad spark plugs is a misfiring engine. Fixing the spark plugs should fix this issue almost immediately. In fact, over time, you may not be able to even start the car, as the electrical current will fail to even reach the engine. As a result, your car will steadily produce less and less power even if you’re foot is square on the gas. As a spark plug’s wire deals with a cut or break, they aren’t able to fully transmit the electrical flow from the battery to the engine. If you are dealing with a loss of accelerative power, this is due to the engine not functioning at its optimal potential. Getting them replaced should immediately fix the issue. If the battery is still working and functional, you’ll know that the issue is likely a result of faulty spark plugs. If you’re dealing with a car that has a difficult time starting, the first thing to do is to check the battery. This is the first sign of potential “knocking”, which we will go over later. Low fuel gauge showing on car’s dashboard.Īs your car’s engine fails to turn over from complete combustion, it must work harder and consume more fuel to maintain its speed. Now, there are many potential reasons for an increase in fuel consumption, however, the first culprit should always be the spark plugs. One of the first ways you’ll know whether you are dealing with an issue with your spark plugs is how aggressively your car consumes fuel.
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