Are you kidding me??

[geoman-01]

I had an ignition coil replaced on cyl. #5 12 months ago.
Several days ago the engine began running rough and the
check engine light began flashing. The diagnostic indicated
a misfire on cyl. #5. I ordered a new coil and when I removed
the old one the spark plug was inside the rubber boot.
The repair shop never screwed the spark plug into the engine block.
I assume the spark was arcing from the plug to the engine block
for the past 12 months!

[Solitude]

Sounds like a good case for going to costco and buying a 100 piece tool kit and doing some of this maintenance stuff yourself..

The flow charts at service shops don't include pictures of tools

[geoman-01]

Agreed. I did replace the coil myself this time around. Advance
Auto provided the diagnostics free of charge and the coil pack
was 95.00. Sure beats $300. And I made sure the friggin plug
was screwed into the block

[rowhard]

And I made sure the friggin plug
was screwed into the block

Hope you mean torqued and that anti-seize compound was used on the threads

[PittVXr]

The repair shop never screwed the spark plug into the engine block.

Wow, that is horrible!

[etlsport]

dang that sucks.. hopefully no damage done to your block.. yea i decided all maintenance would be done by me or with me present when i had a shop tech tell me that he checked my spark plug wires and they needed to be replaced

[Solitude]

after a few hours to think about this.. I am thinking your shop tech turned the plug in snug.. and it unwound over the last year and just snugged into the coil boot tighter.. still substandard maintenance for sure

[VehiGAZ]

i decided all maintenance would be done by me or with me present when i had a shop tech tell me that he checked my spark plug wires and they needed to be replaced

Good thing he didn't notice your blinker fluid was low, too - that stuff is expensive!