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There are a number of ways that a spark plug can foul if you are asking how basically they become coated with oil as a result of numerous ways but basically oil escaping past the intake valve somehow. A little different between two and four cycle engines but basics are the same.
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∙ 12y ago
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Can bad gas foul spark plugs?
yes
Do why spark plugs foul out?
Due to improper fuel-air mixtures.
What is the main reason spark plugs foul on a two stroke engine?
Gas mixed to rich
Why do spark plugs foul on dirt bikes?
spark plugs tend to foul because too much oil builds up around the plug and it cannot work correctly. *sometimes* you can actually remove the plug, clean it, re-gap it, and replace it in the bike.
Why do Spark plugs burn out?
Spark plugs don't really burn out, they foul out. A spark plug is used to ignite the fuel/air mixture squirted into the cylinder by the fuel injector. The plug sends a spark and boom small explosion. However gasoline is not 100% clean, so it leaves carbon deposits on the plug. Over time these deposits foul the plug.
Why would fuel foul the spark plugs after a few days?
My best guess would be the plugs aren't igniting the fuel and it's collecting on the plug.
Why does my1994 Chevy Astro van hesitate when accelerating and will foul the spark plugs?
You might have a blown headgasket on top
Will bigger injectors foul out spark plugs on a 86 accord lxi?
If the injectors are spraying more fuel with out anything else changing, then yes, the plugs will foul. To get more power you need more air in the engine as much as you need more fuel.
Can a leaking valve cover gasket cause a misfire?
Yes, if it leaks oil through and on to the spark plugs, it will foul them and cause a missfire.
Would spark plugs make a car quit while running?
One spark plug could foul up and quit on you but I don't see all of them quiting at once.
When do you change your spark plugs?
when do you change spark plugs
Why the engine feels rough after changed the spark plugs?
the transmition ,is probably not adjusted to the spark plugs,or their not the right spark plugs
