My 1993 ranger 3.0L 5 speed is running rich lost about 2mpd how do you lean it out
Maybe a leaking fuel injector. Make sure the air cleaner filter is clean or replace it.
That sounds like your a victim of winter blend fuel, a lot of the older vehicles will notice an MPG drop of about 2 per gallon. Make sure the engine is properly tuned and your filters are clean. So if there is no check engine light then that is most likely the cause. Note: some of the older rigs might benefit from advancing the base timing slightly but not more than 2 degrees and then you need to listen for engine ping, if any is heard then timing must be put back or engine damage will result. HTH
Search Ford Ranger Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford Ranger Experts