I have 94 7.3 idi turbo diesel crewcab dually automatic. what mpg should I expect ? best I have experienced is 12mpg. recently dropped to 8 mpg and I have a fuel smell in cab, worse at idle. It runs and starts great. Anynone have any ideas? Thanks

 

Depends a lot on your gearing but I would have thought around 14mpg, unloaded. There is a great page on here for the pre-powerstroke diesels (part or the diesel section). You should post there giving as much information as possible. Good luck.

 

Sounds like your injector O- rings are leaking. When its idling look on top of the motor and look for leaks. I had a truck like that and the new fuels eat those seals. The new seals are much better. The Ford dealer charged me about $600.00 in labor for the repair. The parts are about $25.00. Look for someone cheaper for the labor.

 

or do it yourself, I think it took me about an hour to do mine...