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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #26  
Old 03-01-2007
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have you replaced your fuel filter lately?

Something's not right! I get about 340-350 miles per tank with 33s, when I was at 31s I was getting almost 400 miles per tank.
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  #27  
Old 03-01-2007
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you have to gap the plugs to the manufacturers specs; or else it can either run too lean, or too rich. So either, better mileage, or crappier mileage. Was it as bad before as it is now ???
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  #28  
Old 03-01-2007
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Quote:
Originally Posted by DUB Offroad Edition
that sounds about right my buddy figured a rough estimate of 12mpg which isnt good but isnt horrible i guess.....i hope a e-fan will help and maybe some other things.

you better becareful runnin an efan down in the south during the summer..thats the reason i sold mine..it just wasnt enough..dead nut summer in traffic with a/c on wasnt coolin the truck enough..

im workin on something tthat will hopefully work somehting a lil better..if it works for me ill let you know..
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  #29  
Old 03-01-2007
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Quote:
Originally Posted by Lefty04LevelII
have you replaced your fuel filter lately?

Something's not right! I get about 340-350 miles per tank with 33s, when I was at 31s I was getting almost 400 miles per tank.
ohh yea i knew i forgot something....fuel filter was changed the same weekend the radiator was flushed...about 4k miles ago
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  #30  
Old 03-01-2007
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Quote:
Originally Posted by bwester04
you have to gap the plugs to the manufacturers specs; or else it can either run too lean, or too rich. So either, better mileage, or crappier mileage. Was it as bad before as it is now ???

i dunno what all that is all i did was have the guys at the parts store look them up and gave em to me and i put them in......i dont know about all that gapping......**** here i go again ****ing **** up......and yes i do believe i was getting the same milage before
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  #31  
Old 03-01-2007
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o dude you didnt gap take your plugs out and gap them to the right specs and put the mback in that should help some. and the gapper is like $3 at the auto parts store.
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  #32  
Old 03-01-2007
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Quote:
Originally Posted by ranger
o dude you didnt gap take your plugs out and gap them to the right specs and put the mback in that should help some. and the gapper is like $3 at the auto parts store.
what exactly does this gaping thingy help? whats the point in gaping............call me a noob or whatever but iam learning......lol


iam not throwing any codes on the engine besides p401 egr insufficient

Last edited by SteveOh; 03-01-2007 at 09:21 PM.
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  #33  
Old 03-01-2007
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do you have the book on your truck look it up. hard to explain to much spark or to little
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  #34  
Old 03-01-2007
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you can check out cleanmpg.com and go to the forum. There are a whole plethora of ways to save gas there. Gappin the plugs seem to be the problem but they will give oyu some ideas. They specialize in this thing called hypermiling. Look it up. Im using it in my research paper lol.
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  #35  
Old 03-01-2007
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Originally Posted by ranger
do you have the book on your truck look it up. hard to explain to much spark or to little
a haynes book yes but my friend has it at the moment....i bought that book when i did the differnetial seals on the rear......lol a little bit later than i did the plugs wires and such.......lol
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  #36  
Old 03-01-2007
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Wow, you didnt gap the plugs before installation? lol...

Thats probably why you arent getting decent mileage.
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  #37  
Old 03-01-2007
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Originally Posted by 01xltranger4x4
Wow, you didnt gap the plugs before installation? lol...

Thats probably why you arent getting decent mileage.
i dunno...didnt know? ROTF!! i suck i know
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  #38  
Old 03-01-2007
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look on the belt diagram above the radiator, it should say the proper gap for your truck.. I got my gapper for like $1 or so at the parts store, very easy to do but can be overlooked since it's so easy lol Ready to scrape them knuckes up again? lol I remember throwing out the curse words when I did mine, man what a pita.. good luck bro
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  #39  
Old 03-01-2007
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i can get 250 miles easy

change your plugs, fuel filter check the tires and see if brakes are dragging
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  #40  
Old 03-02-2007
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Spark plug gapping according to Haynes Manual....

4.0L OHV V6
Gap = 0.052 to 0.056 inch

4.0L SOHC V6
Gap = 0.061 to 0.068 inch
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  #41  
Old 03-02-2007
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he stated that even before the new plugs he was still getting bad mileage...soalthough gapping the plugs may help, there must be some other cause behind it...
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  #42  
Old 03-02-2007
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Holy Crap, I'm averaging 300 on a tank when the light comes on but I'm only running 32's.

Rick
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  #43  
Old 03-02-2007
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shoot i get 260 miles on a tank easy........i can go up to 300 with no problem.......
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  #44  
Old 03-02-2007
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Quote:
Originally Posted by JSteele
he stated that even before the new plugs he was still getting bad mileage...soalthough gapping the plugs may help, there must be some other cause behind it...
yes, but never the less why not start with what we now know could be a problem/is a contributing problem and troubleshoot from there.

Something coming to mind, and I don't remember it mentioned yet, but check your O2 sensors. I've heard of them fouling up and sometimes not throwing a CEL. This was a problem in my 93, except she threw the CEL code for O2 sensors. I replaced them and still had crappy response/mileage. According to the shop that replaced the O2 sensors (this is going back 3 years and all I knew what to do was change oil, air filter, fuel filter, and spark plugs) they informed me that my spark plugs might have been affected due to how long I had screwed up O2 sensors. Need less to say, my spark plugs were FUBAR too. I replaced them & wires and most of my mild engine tick disappeared and holy crap did that 4.0L OHV come to life again. Mileage was also back, I could make round trips to Albuquerque from Las Cruces (approx. 500 miles round trip) and still have 1/4-1/8 tank left.
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  #45  
Old 03-02-2007
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Quote:
Originally Posted by DUB Offroad Edition
4.10 gears and 34" tires..
Quote:
Originally Posted by DUB Offroad Edition
its city driving stop and go taking off a little fast at times
4.10 gears & 34" tires, stop and go traffic with "taking off a little fast" = bad gas mileage. Your 4.10 gears will not get great city mileage, consider 4.56's if you mostly drive in the city.
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  #46  
Old 03-02-2007
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  #47  
Old 03-02-2007
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lol...I drive 70% city and 30% highway.

With stock programming, stock 4.10 gears, and 35s i get 15.5 in the summer.
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  #48  
Old 03-02-2007
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i feel ur pain 150miles to a full tank :( idk what to do with it i wana toss it off a cliff
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  #49  
Old 03-02-2007
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Quote:
Originally Posted by bwester04
you have to gap the plugs to the manufacturers specs; or else it can either run too lean, or too rich. So either, better mileage, or crappier mileage. Was it as bad before as it is now ???
steven - you keep posting tank fill along with mileage on the trip odometer... you should start calculating ACTUAL mpg so you have a better idea of how its changing from tank to tank, instead of making estimates based on # of miles traveled in relation to how full the tank is. to accurately calculate your mpg, do this:

1) fill up your tank until the fuel nozzle shuts off automatically. don't top off. reset your trip counter.

2) drive around like normal.

3) next time you go to fill up your tank, fill it the same way; fill until the fuel nozzle clicks off (dont top off), take note of the trip odometer and the amount of gas you just filled the tank with, and divide your trip odometer by the amount of gas.

ex: i fill up my tank, reset my odo, and drive around. next time i fill my tank, my odo reads 200 miles, and i fill the tank with 14.3 gallons of fuel.

200/14.3 = 13.986mpg

Last edited by barrman; 03-02-2007 at 04:47 PM.
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  #50  
Old 03-03-2007
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Quote:
Originally Posted by 4X2XLT
if it was winter gas i think he would have noticed before now... i highly doubt theyd start the first day of march...

could just be a bad batch of gas, ive had tanks where ive gotten litereally 10mpg after getting 18 the tank before without really changing much in my driving habits...

One tank I got 14mpg, then the next I got 10mpg. On the 10mpg I was driving EASIER, and shifting earlier, around 2.2k. It's crazy, tune-up coming soon though, see if that helps.
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