A first-gen 5.9 Cummins will set you back a pretty penny today, but the engines weren't perfect, with a number of serious ...

Even though the 5.9L Cummins and 7.3L Power Stroke diesel engines are no longer in production, they're still popular engines.

Diesel engines are common in pickup trucks, like the Cummins 6.7- and 5.9-liter engines that power some Ram trucks. Ford and Navistar teamed up to bring the venerable 7.3-liter Power Stroke diesel ...