Were the plugs wet ?
The beer bottle incident reminds me of a job in the UK years ago.
A guy brings in his new to him Lancia Delta HF Integrale with loss of power. It was 2 years old.
Do some tests and find it has no turbo boost.
Pull Turbo of the car and it is toast.Housings ,shaft & impellers beyond repair.
So I fit a new turbo and proceed to bleed the oil lines.
After flatning 2 battery's and no oil coming out of the turbo dump hose I start to wonder whats going on.
So I took off the braided oil feed line from block to turbo.
The block end of the hose had match sticks jammed into the line.
Turns out the guy bought the car 2 days before from a car yard & only test run it around the block.
The car obviously had blown turbo seals so to stop it smoking the car yard blocked the oil feed to the turbo.
The turbo lasted just enough for the test run & the drive home.
The car yard was sued and lost their license.