The Jeep 4.0L engine ... a stock '97 Jeep TJ in about an hour and a half and also dropped in one of their new throttle body spacers while we had the induction parts off the engine.

In 1991, Chrysler switched to MPI on the 2.5L engines and replaced the 4.2L with the XJ Cherokee's popular 4.0L MPI inline six. The '97-'06 TJ Wranglers offered the pushrod 2.5L and, in the last ...

In the years since, Jeep has passed into the hands of Kaiser American Motors and Chrysler, with its 4.0L engine design amongst the most sought-after and reliably bought models. One of the many ...