RAY: Our buddy Vinnie Gumbattzi decided to do a tune up on his brother's car, and, being the good brother and backyard wrench that he was, even figured he'd change the spark plugs. He knew it was important when removing the plugs not to allow the dirt, grime chunks and other matter that accumulates around the plug over the years to fall into spark plug holes.

Being particularly diligent, he went to the trouble to vacuum the dirt away from the plugs with the official "Click: and Clack Power Shop Vac."

But because the space in the cylinder head where the plugs go was so confined, he couldn't do the best job. So he decided to remove the plugs and vacuum the space with them removed.

TOM: Maybe we could get him to be so diligent around my house.

RAY: For a fee. Anyway, the results of Vinnie's decision to vac the plug holes with the plugs removed were absolutely disastrous. Question: What had happened?

[ Car Talk Puzzler ]