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I changed the busted coil n boot but pressure still come's out from there why

(1999 Ford Crown Victoria)
in Lynwood, CA on March 21, 2016
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on March 21, 2016
4.6L ... Replacement spark plug most likely wasn't installed properly and compression is leaking by it! .. Spark plug has been *cross threaded* into the cylinder head.. Cylinder head, spark plug thread repair kit available and is usually needed to fix this problem.. 'IF' spark plug *thread chaser* doesn't work.
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These engines also had issues with the spark plugs pulling out the threads when removed
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on March 26, 2016
Thank you I fix I was checking the rest of the spark plug they weren't all the same x it had 2 sprkplgs with olny one hook where the spark come out then 3 with 2 hook's and 3 with 3 hooks that normal
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