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I'll start by saying that I do recognize that driving habits greatly affect the gas mileage of any vehicle. In this case, that may be partially true, but I'd like to cover all of my bases first.
My '92 2.3L (just over 100k miles) 2wd 5-speed only averages between 18 and 22 mpg. Most of the driving that I've done with it so far has been on the highway, though I also use it to drive 2 miles to campus several times a week. I replaced the spark plugs (which were extremely worn) and the plug wires. I have also replaced the air and fuel filters, just changed the oil & filter, and have changed the transmission fluid. The PCV valve is new. The tires are properly inflated. I now find myself having to downshift less on hills on the highway, but the fuel economy isn't any different than before all of these services.
What could be causing this seemingly poor fuel economy? If it were something like a bad EGR, wouldn't the truck run like crap or not idle? Could it be an oxygen sensor or something? I'm quickly running out of ideas, and it really bothers me that my gas mileage is almost equal to that of my stepdad's 4.0L Ranger. Had I known this would be the case, I may have opted for the extra power!
Kevin in PA
My '92 2.3L (just over 100k miles) 2wd 5-speed only averages between 18 and 22 mpg. Most of the driving that I've done with it so far has been on the highway, though I also use it to drive 2 miles to campus several times a week. I replaced the spark plugs (which were extremely worn) and the plug wires. I have also replaced the air and fuel filters, just changed the oil & filter, and have changed the transmission fluid. The PCV valve is new. The tires are properly inflated. I now find myself having to downshift less on hills on the highway, but the fuel economy isn't any different than before all of these services.
What could be causing this seemingly poor fuel economy? If it were something like a bad EGR, wouldn't the truck run like crap or not idle? Could it be an oxygen sensor or something? I'm quickly running out of ideas, and it really bothers me that my gas mileage is almost equal to that of my stepdad's 4.0L Ranger. Had I known this would be the case, I may have opted for the extra power!
Kevin in PA
