MISFIRE FIX COIL OR HEAD GASKET??? CADILLAC DEVILLE NORTHSTAR

MISFIRE FIX COIL OR HEAD GASKET??? CADILLAC DEVILLE NORTHSTAR

I have a 2003 cadillac deville with 169k miles. I’ve had some misfiring on and off for quite a few years. I recently figured it out!!!
Hope this helps someone else.

Go to the 13:38 minute mark in following vid to see the correct sequence of unscrewing the bolts for the ignition coils.

For info on the TCC codes see following:

https://www.cadillacforums.com/threads/malfunction-indicator-light-with-p0741-and-p1860.203046/

https://www.cadillacforums.com/threads/code-question.116642/

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