I have a Nissan b13 model with a GAv15 engine. Have you tried a different brand of spark plug? Dude if a plug is fouled. Throw it in the trash and buy new ones! Dang man if ya too damn cheap to buy a spark plug you prolly shouldnt be pullin a wrench on anything. Just my opinion….. Thats a fact. Pingback: Ask Away! Your email address will not be published. Your Website. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam.
Learn how your comment data is processed. Summit Racing Equipment. Possible Causes: Oil leaks, poor fuel quality. During his year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines. He has also partnered with mainstream and trade publications on a wide range of editorial projects.
In , he helped establish OnAllCylinders, where he enjoys covering all facets of hot rodding and racing. Tom Loud says: July 20, at pm. L says: December 2, at am. Do you have a PCV system?
If so bad valve or poor baffle under valve. Jeff Wilson says: September 28, at am. Joseph Shemanski says: September 7, at am. This buildup has gotten to the point where the plug can no longer generate the sparks needed for efficient combustion. That matte coating is the carbon buildup. They are:. Carbon fouling on a spark plug is caused by a problem with the fuel that you use.
Often, we describe it as a fuel mixture that's too rich, which means that the ratio of fuel to air is far too high. That can cause combustion problems, resulting in excess carbon that sticks very quickly to the hot parts of the spark plugs.
Again, we must remember that carbon fouling or any other type of fouling, for that matter is only a symptom and not the root problem. So, if you know that you're experiencing carbon fouling, you must troubleshoot and resolve whatever issue causes it. If not, any new spark plugs that you place in your engine will just get fouled up all over again. The most effective way to diagnose your spark plugs is to take them out and inspect them with your own two eyes.
Still, there are some other tell-tale performance symptoms that you can look out for before you choose to do that.
They include:. Sure, those symptoms can point to a long list of different problems under the hood. The customer would report increased oil consumption that exceeded one quart every 1, miles. Advertisement Beyond the oil getting past the rings, the oil trapped in the rings can become carbonized and cause damage to the cylinder walls. This can lead to even more damage and more oil consumption.
In some cases, the oil consumption results in a low-oil condition that would cause damage to the bearing surfaces. Internal coolant leaks can foul a spark plug and cause a misfire.
The problem could be a leaking intake manifold or a head gasket, and the fouled plug might be localized to one or two adjacent cylinders. The burned coolant leaves ashy, white deposits on the electrodes and insulator, creating hot spots that could cause pre-ignition and a misfire code to be set. Advertisement When the plug is pulled, it might have a chalky appearance on the ground strap and center electrode. Modern coolants do not cause this type of buildup quickly, due to the reduction of phosphate, zinc and other additives that can contaminate the catalytic converters.
Unfortunately, it also means that drivers will run a vehicle with a coolant leak for several thousand miles, while the plug becomes slowly fouled. In the past, the converter would become clogged and stop the engine before significant damage occurred. Feature Solutions. Dealer Service. Digital Edition. Contact Us. Magazine Current Issue Past Issues. Connect with us. Advertise Subscribe Contact Us. By Andrew Markel.
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