clicking coming from my third spark plug

1983 FORD F-150
85,000 MILES
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PATCHES12
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  • 1 POST
There is a clicking and vibration coming from my third spark plug in my truck. Does this mean the connection is bad??? I changed the spark plugs, but the truck still seems it missing and the clicking is coming from plug 3
Jan 13, 2012 at 3:17 PM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
It sounds like the plug is loose, check it, and do a compression check the engine, you will probably get low or no reading on number three.I have seen this when the head has a hairline crack at a valve. Can only find the crack when checked at a machine shop after head removal.
Jan 13, 2012 at 4:15 PM
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