- #HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG HOW TO#
- #HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG CODE#
If you're using multi-electrode spark plugs, like the Bosch Platinum+4 spark plugs (which have four side electrodes), then you don't need to check the air gap. Over the years I have diagnosed and resolved many misfire problems that were caused by pre-gapped spark plugs that were not gapped correctly. If the packaging of your spark plugs indicates that they are already pre-gapped, I suggest that you check the air gap anyway. TIP 2: Check the air gap of the new spark plugs with a spark plug gapper. If you attempt to remove the spark plugs from a hot engine, you run the risk of stripping the threads of the spark plug holes in the cylinder heads (which are made of aluminum). You can place a box fan (or any other type of house fan) on top of the engine to cool it down faster.
If the engine has been running for any amount of time, it's important that you let the engine cool down completely before attempting to remove the spark plugs. TIP 1: Replace the spark plugs with a cold engine. If you do take the plunge and replace them yourself, here are a couple of suggestions:
#HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG HOW TO#
And you can also find written and video tutorials on the Internet on how to do it. The cool thing is that you don't need a bunch of expensive tools to replace them. Replacing the spark plugs on your 3.8L Ford Mustang can be challenging but not impossible and can even be fun. Here's the reason why: Even if you were to install the most expensive spark plugs, you're still gonna' have to replace them at a much shorter interval (just like you would the cheaper ones) because the engine is fouling them up with carbon. My suggestion to you is that if your Ford Mustang 3.8L engine is burning oil and the spark plugs you're pulling out have carbon buildup on them, then use the most inexpensive ones. Some of these spark plugs are expensive and cost more than the original Motorcraft spark plug. And most of them if not all will work on your Ford Mustang. Having said that, you'll notice that there are many brands of spark plugs. These are the spark plugs that you should buy when it's time to replace them. Your 3.8L V6 Ford Mustang came equipped with Motorcraft spark plugs when it rolled-out out of the factory. This doesn't happen overnight but it will happen.Īs I mentioned before, wear and tear is not the only thing that will keep a spark plug from sparking.Ĭarbon build-up blocking the spark plug's air gap is another type of problem that will cause the spark plug to stop working. It's this very spark that eventually will wear down the center and side electrodes. The spark plug is designed to deliver spark to the inside of the cylinder it's bolted into.
What Causes A Spark Plug To Stop Working? One other symptom that you'll notice, when the spark plugs are worn out or have carbon buildup closing their air gap, is bad gas mileage and a lack of power under load. Wear and tear is not the only thing that can cause a spark plug to fail or cause a cylinder misfire condition.Īnother common problem, that will cause the spark plug to stop sparking, is carbon buildup blocking the air gap betwenn the center and side electrodes (caused by the engine burning oil inside the cylinder or cylinders).Ĭarbon build-up that causes the air gap of the spark plug to close is something usually seen in high-mileage engines. You'll see one or more of the following misfire trouble codes:
#HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG CODE#
And if the spark plug is causing a misfire, you're gonna' have a corresponding misfire trouble code lighting up the check engine light on your Ford Mustang's instrument cluster. Symptoms Of Worn-Out Spark Plugsĭepending on how worn out the spark plug is, it will either cause a rough idle condition or a cylinder misfire condition.
The spark plug is the component that provides the spark to ignite the air-fuel mixture swirling in the cylinder.
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