Nothing significant really developed for these trucks until 1988 and 1989, when the introduction of electronic fuel injection and new engines made a debut.
The electronic fuel injection was offered for the 5.2-liter V8 engine in 1988, and then to other engines in 1989. It gave the engines better overall performance compared to the carbureted versions that were previously used. Now, the delivery of the fuel was more precise and efficient than before, which resulted in a smoother working engine.
In 1989, Dodge introduced some new engines. A 3.9-liter V6, sporting electronic fuel injection and generating 125 horsepower replaced the 3.7-liter. The 5.9-liter V8 stuck around and also received electronic fuel injection, which bumped up the horsepower to 190.
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