Originally Posted by mam4.6

You nee 2 people to check them. 1 person watches the engine from outside of the vehicle., while the other person firmly places their foot on the brake, engages Drive, and, while continuing to hold the brake, punches the gas pedal. Punch, immediately releasing the gas. You shouldn't see much movement of the engine at all. If it moves, or if it ''comes up outa there'', they're shot.