Spark plug tapping/clicking
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Spark plug tapping/clicking
Good evening. I have 95 f150 4.9 liter inline 6. Replaced distributor cap, rotar, plugs and plug wires and ignition coil within the past week for unrelated problems. I have noticed on the spark plug 2nd from the back is making a clicking sound and when you grab the plug wire near the block you can feel something tapping on the plug. When you gently move the plug wire to a certain position the clicking sound stops but still feel a slight tapping. Also, when driving, it feels like there is a cylinder misfiring. I am open to any and all suggestions. Thanks in advance.
Elder User
Joined: Jul 2011
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From: Vernon, BC
That tapping noise is your spark jumping from either the wire or the plug to the engine. Your plug wire may not be fully inserted onto the plug or the wire or plug boot may have a crack in it. If that checks out your plug may be faulty. switch it with another one and see if the tapping (shorting out) follows the plug. If you can, wait until it's dark and then look under the hood with the engine running. You will see a blue spark.
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Well i went out there and couldnt find a a blue spark however i did pull the plug and reseat it and the tapping feeling and noise went away. Must not have had the plug seated properly when i installed new ones last week. I am gonna scan it tomorrow to make sure its not misfiring anyways. Thanks for the info dave. Much appreciated.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Well i went out there and couldnt find a a blue spark however i did pull the plug and reseat it and the tapping feeling and noise went away. Must not have had the plug seated properly when i installed new ones last week. I am gonna scan it tomorrow to make sure its not misfiring anyways. Thanks for the info dave. Much appreciated.
Elder User
Joined: Jul 2011
Posts: 793
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From: Vernon, BC
Yuppers, that is so true. Mine went through a number of plug wire harnesses and I never got any code except running rich (I don't remember what the code was for that, sorry)
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DarrellJ
1967 - 1972 F-100 & Larger F-Series Trucks
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Dec 23, 2010 02:42 PM
