Testing COPs
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New User
Joined: Sep 2009
Posts: 4
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Testing COPs
I changed my spark plugs at 95 K.. Read and compared the resistance (primary and secondary) on all my COPs upon removal. Found one that read lower but reinstalled it. Truck still seemed to have a miss, so I changed it out. Seems to idle smooth and only appears to miss upon acceleration.. Any ideas out there! Appreciate the help. I'm glad to be a ford owner!
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
Well, testing the resistance does allow you to find a bad one, but you can still have a bad COP even if the resistance is correct. A miss on acceleration might be a dirty MAF sensor.
