Car and Truck Repair

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What is causing sparkplugs to foul out?

Had my plug wires and spark plugs changed, why does cylinder 2 keep fouling out?

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Both rj713 & 040304 know what they are talking about +

by mayer

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Usually its oil fouling.You may have a problem with a head gasket or possibly a valve guide. You should have a compression check run to see if you have a problem with that cylinder. A inexpensive temporary cure would be to install a oil fouling plug in that cylinder. Ralph

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You could install a hotter plug in that cylinder.

What kind of vehicle? What brand of plugs? Did you change the plugs along with the wires? What kind of wires are you using?

Thanks

Frank

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Make sure you check the spacing on your plugs in addition to checking to make sure they're not covered in oil or dirty in general. This rule goes for even the plugs that are pre-measured spacing. Other then that check your distributer cap and also spark plug wires if you keep having spark problems (also depending on your vehicle that type of spark plug wires can cause issues if they're not using tolerances that are equal to OEM).

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Excess fuel dripping in from petcock to carburator to cylinder . If your oil smells like gas. This will be your problem. Typical gas tank too high issue. Leans out your oil to cause worse damage.

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