2.3L ('83-'97) Low mpg

[scotts90ranger]

the fuel pump doesn't sense anything, and the fuel gauge has zero impact on how the engine runs

 

[scotts90ranger]

On the other hand if you managed to plug off the return line while you changed the pump that would cause the fuel pressure to increase a lot and it would run unpredictably

 

[Slowestranger88]

So I pulled all the gas out of the tank. Lately it’ll say it’s empty and it’ll take 6 gallons to fill it up. Thought that was fishy. Syphoned it out and it had 10 more gallons in it. Saying it was almost empty. I installed the pump with the tank half full. Now it won’t read that it has any fuel unless it has 8 gallons in it. Then it’ll barely move above empty. So my thought is that it’s not getting bad mpg. It just is only reading half the tank.

 

[sheep herder]

Gas mileage is miles driven divided by gallons used. Anything else is just a wild ass guess.