Hello, I have a 1994 ford ranger 4.0 with 31'' tires. My gas gauge doesn't work and I plan to fix it, but until then, does anyone have an estimated mpg? I know I can find the mpg for a stock ranger online, but I was hoping someone with a similar build could tell me. Thanks.
Jack

 

With 31" tires your speedometer and odometer don't work either, lol
Odometer will read low, so if it showed 100miles driven it would be more like 110 miles driven

I would safe guess it at 15MPG
Its a 20gal tank, well 19.5 in an extended cab Ranger, very few regular cab Rangers with 4.0l, but it you have one then there is only a 16.5gal tank
So I would not go more than 225 miles on a fill up
Use about 15 or 16gal, so a little margin for errors

 

Ok, thanks for the information.

 

As for the gas gauge

There is a sender and float in the tank
Sender uses 16 ohms for empty and 160 ohms for full
There is a Yellow/white stripe wire that runs from the sender in the tank to the dash board connector
From there it goes thru an Anti-Slosh module in the back of the dash, and then to the guage

Google: Ford anti-slosh module

Its a plug in module on the back side of the instrument cluster

So I would pull out the cluster and unplug the connectors
Find the Yellow/white wire, and hook up an OHM meter to it and a Ground
It should read between 16 and 160 OHMs, rock the truck a bit and as gas in the tank sloshes around the OHMs should go up and down as well
That tests the float and sender
If OHMs are 16 and stay there then float has a hole and has sunk to the bottom of the tank, or you really are out of gas, lol
If OHMs are 3,000+ or you see N/C that means yellow wire or sender is disconnected


If its OK then problem is most likely the anti-slosh module
It can be replaced or by-passed

Anti-slosh module delays the senders OHMs from going to the gauge, this prevents gauge's needle from going up and down every time you go around a corner or hit a bump as gasoline sloshes around and float goes up and down in the tank