I recently purchased a 1988 Ford F350 460 manual trans truck. It was in pretty bad shape but it ran. After working out all the major issues I found that the fuel mileage was alot woarse then expected. 7MPG bad on the open road. I can live with 10-12MPG, but 7! I have no clue to why it is so bad. If anyone has any advice I would really appreciate it. One thing that is a bit wierd too, is the truck pasted smog even with this issue.
Yeah I went through the truck completly. It has new spark plugs, Cap, rotor, spark plug wires, air filter, fuel filter. The truck has 33's on it air pressure is at the recommend pressure on the tires. How could a guy check to see if the cat is plugged?
E3 plugs are Chinese snake oil like Split Fire etc. A KN is a waste of time as well. A good tune up with quality parts and fresh fluids is what would be best. The 460 should get around 10-14 mpg in stock form.
__________________ 1995 F-150 XLT 2WD 5.0 4R70W 3.55 LS (awaiting 5.8 swap)
1965 Mustang 302 T5
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