Kevin Go to the nearest Checker's, Auto Zone, WalMart or what ever and get yourself a compression checking tool/gage. They come in two styles...low cost cheapie you must hold it in the spark plug hole with force and the more professional style which screws into the spark plug hole. The directions are on the box. Your local HS has one in the shop. Ask. Rodger & Gabby 47 De Soto Custom 63 Le Baron 66 Le Baron