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  #1  
Old 02-01-2008
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Getting bad gas milage

I have a 1998 ranger with a 3.0. It has 189,000 miles on it and my gas milage keeps getting worse. It starts good and runs good (nothing noticable when running or idoling) The problem is, it's getting about 18 miles/gallon, down from about 23miles/gallon when I got it used.

I have had it to the shop several times for this problem and for tune ups They told me the problem was the ECM and the coolant temp sensor. They changed the coolant temp sensor and flashed the ECM and said that would fix the problem, it didn't.

I was wondering if anyone else has had this problem and if so can you give me some tips of help fix it.

Some guys at work told me to change the oxygen sensors and clean the mass flow sensor at the air filter.

Oh yeah, the garage said that no codes was coming up on the computer.

Thanks in advance for any help,
Kwdaye
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  #2  
Old 02-01-2008
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Unfortunately 18mpg is great for a 4.0L so I can't help you there.
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Old 02-01-2008
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i changed the fuel filter on mine and it went up 1-2 mpg but i still get 16mpg wtf even after exhaust k&n and fuel filter but i guess its better than the 13 i got when i first got it. any ideas on how to get better mpg?
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Old 02-01-2008
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Here....let me say what i always say in these threads....



YOU BOUGHT A TRUCK......DEAL WITH IT!
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Old 02-01-2008
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Remember it is cold out. Im assuming its cold in cincinnati. It takes more gas to warm your truck up.
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  #6  
Old 02-01-2008
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im getting 14 last time i checked...with exhaust, intake, and 33's
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  #7  
Old 02-01-2008
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Ranger Guy is right about gas milage going down in the winter. But 5 MPG seems a bit extreme.
When I first got my 02 XLT 3.0 automatic, it was getting about 17-18 on the hi-way.
I was only able to go about 275 miles on a tank.
The truck had 22,000 miles on it. I ran a can of fuel injector cleaner through the gas tank.
Waited 3000 miles and did it again. Mileage improved to just over 20. I now routinely get 315-325 miles on a tank.
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  #8  
Old 02-01-2008
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getting 11 consistant.
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Old 02-01-2008
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wow thats amazing cuz i get around 235 a tank but i think its funny that FORD says 4.0rangers can get 18-20 mpg but we all get under 16
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Old 02-01-2008
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epa window stickers say either 16 or 17 for a 4.0L.
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Old 02-01-2008
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sorry i was thinking of the 3.0
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  #12  
Old 02-01-2008
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I get 18 in the summer, and am currently getting 12.
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Old 02-01-2008
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alot of that is a huge attribute to the watered down, not efficient ethonal that the gov't throws into gasoline to make it watered down. I effin hate that. Don't get me started on ethonal....it's a HUGE waste of power, both making it and burning it.
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  #14  
Old 02-01-2008
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I get 16 with my 4.0 and 4.10s and 33s
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  #15  
Old 02-01-2008
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This was posted in another thread. CHECK YOUR TIRE PRESSURE. In cold weather your tire pressure can drop several lbs.
Some guys in the other thread spoke of losing 5-6-7 lbs.That will cause you to lose mileage. Living in So. Calif. I forgot all about that.
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  #16  
Old 02-01-2008
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your almost to 200k miles... could just be the engine getting worn out??
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  #17  
Old 02-01-2008
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could be just getting worn out but it still runs great just crappy mileage all of the sudden. anyone else have any suggestions
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  #18  
Old 02-02-2008
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Also, most your you all keeping talking about 4.0 liters, I HAVE A 3.0 liter,automatic and this was happening in the summer also. I just now starting B!tching about it to find out what's wrong
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  #19  
Old 02-02-2008
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i to have been getting bad mpg with my 4.0 i get 12-13mpg all the time and tryed everything i can idk what to do eather.

as for your 3.0 check the plugs mine had the platnum 2 autolights and they were worn out in 30k and i changed them and my mpg went back up to 16 thats what i try to get in the summer time. so check that to
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  #20  
Old 02-02-2008
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Plugs, wires, o2 sensor, fuel filter, sea foam, clean MAF, clean (or replace) air filter, pump tires up to 35 psi, get an alignment, remove excess weight, that should do it.
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  #21  
Old 02-06-2008
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'00 4.0 auto 4wd. I used to get about 15/19 (town/road) but now its pretty consistant around 10-13 regardless of weather, season, planetary alignment. etc. I've replaced fuel pressure regulator, fuel filter, plugs, wires, cleaned the MAF, tire pressure, alignment, seafoam. Even cleaned the floor mats... Mine idles pretty rough too. 3 garages have looked at it and said its fine. BS. I'm not trolling junk yards looking for another MAF for cheap to swap out and test. WIll pull the O2's when it warms up. Anyonne know a good priest that performs exorcisms?
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  #22  
Old 02-06-2008
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Quote:
Originally Posted by Fx4wannabe01 View Post
Here....let me say what i always say in these threads....



YOU BOUGHT A TRUCK......DEAL WITH IT!

haha....hes right ya know. rangers arent made to get good gas mileage..
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  #23  
Old 02-06-2008
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Quote:
Originally Posted by Fx4wannabe01 View Post
Here....let me say what i always say in these threads....


YOU BOUGHT A TRUCK......DEAL WITH IT!


If u want good gas mileage, buy a single cab 4cyl toyota or dont buy a truck.
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  #24  
Old 02-06-2008
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Quote:
Originally Posted by sams dad View Post
'00 4.0 auto 4wd. I used to get about 15/19 (town/road) but now its pretty consistant around 10-13 regardless of weather, season, planetary alignment. etc. I've replaced fuel pressure regulator, fuel filter, plugs, wires, cleaned the MAF, tire pressure, alignment, seafoam. Even cleaned the floor mats... Mine idles pretty rough too. 3 garages have looked at it and said its fine. BS. I'm not trolling junk yards looking for another MAF for cheap to swap out and test. WIll pull the O2's when it warms up. Anyonne know a good priest that performs exorcisms?
Have you tried Seafoam?
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  #25  
Old 02-06-2008
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my 98 4.0 w/ 32'' BFG A/T gets about 16 :( its saddening sometimes.

But in the summer the CBR600RR gets about 36, so i guess its a trade off.
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