I have a 1997 Ford 250 with a power stroke and a zf manual transmission in it and in 5th gear I run at 2300 RPMs and I get ****ty fuel economy like 8mpgs and I need to
Know why it's ao ****ty

 

I get 9 or 10 pulling my camper at 70mph and it weighs 16K. You have something really wrong. Check for fuel leaks, dirty air filter, fuel filter, etc. Maybe your cat is clogged, get rid of it. More guys will come along.

 

3.55 or 4.10 gears?

 

Idk it's stock 2wd

 

At what speed are you turning 2300 RPMs.

 

About 110 kilometer per hour

 

Thats a bit under 70 MPH so I would say you have 4.10 gearing.

 

Well what fuel economy am I supposed to get

 

Well I get 16-17 with 37 inch tires. With 410s

 

K well any suggestions bout my poor economy

 

Depends on speed. Most people don't realize how much more resistance just 5 mph makes. I have 4 wheel drive and a 4 inch lift. If I go 65 (1900 rpm) I get in between 15-17, if I go 70 (2200ish rpm) I get in between 13-15, if I go 75+ ( 25-2600 rpm) I get 12. That's on 285
tires also.

 

As far as getting better follow the advice posted above. Could be multiple things. Driving habits are the biggest problem in saying I get x amount of mpg vs another guy who gets x amount. Try to drive it without revving past 2k for each shift. I get great fuel milage when I can discipline myself to do it. Air intake and exhaust mods CAN help but bad injectors, leaks, and air restrictions are a good place to start.

 

How does it run? Any fuel leaks? How many miles on it? What size tires? Filters (air, fuel, etc) clean?

 

BTW, WELCOME to the forum.

 

Unplug the electrical plug on the MAP sensor and see IC it gets better. The MAP is on the pass. side on top of the a/c box it has a 3 wire plug and a hose on it.