Yahoo Autos How to replace your spark plugs | Autoblog Wrenched
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Spark plugs are the heart of your car's ignition system. If yours are worn out, new ones can dramatically improve your performance. See how to replace them here. Watch all of our Autoblog Wrenched videos for more tips on how to diagnose, fix, and modify cars from professional detailer Larry Kosilla. While you're at it, check out Larry's other car cleaning and maintenance video series Autoblog Details!
Materials Used:
Tape
The sparky heart of your ignition system
If your spark plugs are worn out, new ones can dramatically improve your performance. Doing it yourself is easier than you think. Make sure the prop rod is securely in place or the hood struts are in good working order, so the hood doesn't fall on you during this repair. It seems like spark plugs last a lot longer these days, but what are the signs indicating they need to be changed? If your car has a rough idle, a decrease in performance, or if you're consuming more fuel, your spark plugs could be a likely culprit. Prior to starting the job, look at your owners manual to find the correct spec plugs for your car and engine.
Know your plugs
There are a few different types of plugs. The basic is copper, while platinum and iridium will last longer. Unless your car is heavily modified, sticking with original equipment spec is usually the best bet. Visit your local auto parts store to buy the plugs, but if they don't have the OEM brand, they can usually cross reference a suitable replacement.
Prep is key
Lay a towel over the fender before you get started to protect the paint as you will be leaning over the engine for some time. On this particular car, we needed to remove four allen bolts to reach the plugs. Remember to mark the location of each wire before you remove anything. Likewise, you can take a quick picture with your phone for safety.