4bangerjp.com
General Forums => The Mess Hall => Topic started by: chardrc on July 28, 2006, 07:14:21 PM
-
hey what do you guys get for gas milage with your 4bangers. i jsut filled up today and i only got 12.78mpg.. not a huge surprise since i have to flor it alot to acl and get over hills but still if i swaped a chevy v6 in my jeep i would get beter milage.. (we have a s10 with 1 in it and it gets 19-20 but thenagain the jeep will be less arodynamic but also lighter)..
so ya what kinda fuel economy do you get and what year and tire size..
mine is a 1990yj with 31's stock gearing and get 12.78mpg
-
I have a 97 TJ with 33's and my mpg are close to what you get but I have not changed my spedo gear and I don't know if that affects the accuracy.
-
15-18 mpg depending on how much highway driving and such. I tend to floor it quite a bit as well. I have stock everything with 30s at the moment.
-
ya i have stock everything except 31's and havent changed the speedo gear so thats taking away some..(about 3-5mph so you could find a percentage to multiply by to get corect but it wont change much.)
and also mine being a 1990 so it has tbi insted of mpi which loses power, fuel econony, and i cant do the easy cheep 4l throughtle body swap
-
17mpg with 33's :D
Hoping it's improved a little more now that I've got the 'ol 4-banger running a little better.
-
I usually get around 19mpg, but i got alittle bit over 20 on this last tank. 31s, stock gearing. I'm sure that v6 will get crappier mileage in the jeep then your s10 also. Make sure your jeep has been tuned up recently.
Randy
-
ya i know it will get crapyer gas milage in my jeep compaired to the s10...
as far as tune up goes.. the moto has 150k miles on it adn the last owner did no matnince ot it other that he got the engine rebuilt but only the valve train.. none of the botom of it was rebiult and after that he cracked the valve cover so it was constantly leaking oil tell i got it for free cuz he ran the brakes so far past shot that the brakes gave out when driving to work.. and i had fixed the oil leak problem but now its leaking again... thinking its a rear main seal but that means tking motorout and rebuild the whole engin(if you want to do it right) but id almost rather put in a new motor than rebiuld the tired 4banger..
-
1989 wrangler, 2.5L w/TB, 5 spd, 4:11 gears, LT235/75R15 tires, 2" lift, 149,000 miles all stock and get 19 around town and 22 highway 65 mph.
-
2005 tj 2.4l 33x12.50 intake and exhaust i get 15-17 if im on flat land and i can drop it in 6th i can get a little better milege but that situation is rare
-
im going to put new plugs and wire in it when i get a chance to go to the parts store.. ow ya and another question.
doesn anyone have a vacume hose diagram for 1990 yj's cuz when i put my lift on i found a bunch of dryroted vacume line type things by the rear pasanger fender adn it didnt look like it was doing much so i neglecxted doing anything with it.. but now when i have a full tank of gas you can smell gas and ive noticed that it is runing richer than it should....
its funy cuz now that i think of it when we drive our cj3a with original engin onroad we get something like 18-20mpg which is realy good considering its a old flat head.. and its beter than my jeep is going right now.
-
95 auto, 3.73, 31's, 90K on the ticker
16 city 13 hwy
That's not a typo.
-
20mpg here
-
I'm getting about 360 miles in the city with my 20 gallon tank, so guess I'm looking at 18mpg city on 29s.
If you're looking for good mpg, buy a 4.0L I6 and add a Supercharger :lol:
-
hey what do you guys get for gas milage with your 4bangers. i jsut filled up today and i only got 12.78mpg..
ACK! I get that much in my 1986 Suburban with a 350 / TH700R4 / 3.73 / P235/75R15XL factory setup.
On my '98 Wrangler with the factory 4-banger and 4.11s, I get 18-20 m.p.g. I run 30 x 9.50 x 15 BF Goodrich AT KOs on it. I did do the speedo gear swap, so I know my data is accurate.
I'm a maintenance/service log nut, so I keep fuel records on all the vehicles. Would you believe I paid $0.959/gal. for the first tank I put in my Suburban 13 years ago? Boy, how times have changed... :?
Maybe time to check your O2 sensor? Dirty air filter? You should get more than 12-13 m.p.g. for sure. Good luck!
-
Well, a TBI 2.5L is down by around 12hp compared to the later MPFI's. The biggest problem with Jeeps is wind resistance. There isn't much you can do about it and if you have to drive on the highways you pretty much have to push it.
Currently I get around 18mpg with my 35's with mixed driving. If I push my Jeep to 65-70mph mileage starts to drop. If I was able to drive at 55mph without getting run off the road, I'd be getting better mileage.
When I was running 32's and basically stock, I could get into the mid-20's. But then that was when speeds were 55mph and actual speeds were 60mph.
I still might get a set of smaller tires for my Jeep when I have to get new tires. Bigger tires are expensive in more then one way. Now if I could find someone locally with 33x10.5's or 9.5's to try out. :lol:
12-13mpg is a bit low but considering it's probably got high mileage, it might be time for a rebuild or swap. They still should get 16-18mpg.
-
97 TJ, stock 4cyl/auto, 4.88s, lockers, 4"+ lift, 34x10.5 LTBs. No speedo adj., maybe 11 at 70-75mph.
-
ya its got over 150k miles on it.... so it does need a rebuild or swap... espicialy since its leaking oil again and i thinkl its coming from the rear main seal.. which is a total pain since i jjust had the motor out to replace the clutch slave cylender during christmass..
and speaking of dirty air filter.. it has a new one since when i got it tyhe air filter was so full of dirt and crap that it looked like there was a rats nest in it(cant remember if there was forsure but proalby wasnt since no wires were chud throw and it was a dalydriver.)
as bad as it sounds and is i might endup runing this motor tell it blows and or totaly gives up on life.... but hopefully i do something engine wise gefor that.
ow ya and does anyone (cough cof jeffy(or anyone else)) know were i can find a map / guide for te vacum lines for a 1990 yj(my jeep) because i have a bid ball dryroted vacumelines behind the plastic iner fender of my rear pasenger fender. i asume it has something to do with the gas tank since when i have a fun tank of gas i can smell gas and it takes a longer than ususla to start..
-
I only have a few tanks of gas sense cam, head, and rockers and I didnt wright the numbers down but I think at @12 mpg but I drive it prety hard. :nothing:
-
hey supryj4 is that right that you have a 1990 yj with mpi??? did you convert it or get a new ingine.. cuz i have a 1990 and it only comes with tbi..
-
yes I converted the whole wirring harnes,intake,etc from a 94
-
how much of a performance gain did you get.. how much it cost... how much time did it take....
so it was just (understatment) replace computer wireing harness intake manifuld.??/ but for that much work i could just put in new motor but it is still an interesting idea..
-
I had the whole thing torn down to a bear tub and I had a 94 parts jeep so it wasnt much more work than what I had to do any way to get running again.I had a brand new 2.5 on the stand already or I might have done an engine swap.But I really like my little 4 and I origanly was planning for a supercharger wich is the reason for the supr yj 4. And for the how much did I gain part it was about 5 years and a whole lot of work between the two so I cant realy say but part of the swap was that the are alot more aftermaket parts available for the MPI than there is for the TBI
-
ya thats what ive run into is that there isnt much aftermarklet for tbi 2.5 so your stuck unless you do what you did to get mpi.
-
i got 4.0 whit a blower and upgraded injectors it gets around 15 to 16 and my other 4.0 gets aroud 8 to 10 so if you got the money get yourself a 4.0 with a blower it makes a huge amount of power compaird to the extreamly little 2.5l and gets pretty good mpg too in my opinun go with the 4.0 youll engoy the power and the mpg wont be much diffrent from yours now but then agan you wont have to have it to the floor anymore to clime the hills :D
-
well i dont think i said it in this thread but i do have a rebiult 4.3l chevy v6 siting in my gatrage waiting for a home(soposed to go in a cj2a we have siting around but i want that to change). but to swithc motors i need to get a stronger trany than the ax5.. we do have a trany that i can get a kit so it will work in my jeep but its ony a 4speed with a grany first so i would lose my highway speeds in a decent rpm range..
-
I just took a 12 hour drive up to and back same roads to Camp Jeep in Wisconsin. Driving up, I kept a 65-70 mph. On the way up, I'd shift into 2nd gear (auto) to keep and accel from 3000rpm to 5000rpm. Then shift back to 3rd and get 3200rpm to maintain the speed. That's my normal driving. Worst 8mpg, highest 12mpg. Then on the way home, I drove like an elder person. No accel but constant rpm speed. The auto did downshift or unlock the TC and gain 400rpm. I got much better mpgs!!!, 16 high and 14 low.
So sort of proof of driving habits due impact the mpg.
-
Looking at everyone's mileage has got me a bit upset. :? I'm jealous of you guys seeing the 20 mpg mark! I get about 14 mpg combined highway/city.
BUT I drive with the top down and doors off! How about you guys? Nobody is saying how they generally configure their Jeep when driving.
For example when I used to drive the Jeep with the top up (back when it was my daily driver) I was getting a few miles more per gallon. I have 31inch BFG A/T's, along with a spacer and 4.0 TB, and have not corrected the speedo calibration so I know I'm losing a little there.
-
I've had a Safari top and no doors since May and mileage was checked during that time. However, I just replaced plugs, wires, cap and rotor in preperation for the Jamboree. It's embarassing that I haven't checked it since I bought it last year, but it seemed to run fine. :oops: Plugs looked ok, but the inside of the cap was severely corroded and the wires fell apart while taking them off. I'm sure mileage will be better now. I'll check on the way to Crandon and see what I get.
-
This was talking about on the list. What comes into play are speed, aerodynamics and weight. For city, it's probably best to use the soft top. It's weight is minimal compared to no top but it's still aore aerodynamic then no top. With no top, wind is very turbulant and all of this wind does slow you down to some extent. Now a hardtop is more aerodynamic then the soft top but adds a lot of weight to the Jeep.
As speeds increase aerodynamics becomes more important and weight becomes less. At higher speeds the soft top will baloon up. Keep in mind the soft top is 4" taller then the hardtop. Also to some extent the texture of the cloth will grab the air a bit. At higher speeds the pressure increased inside which causes the doors to flap a bit too. So at higher speeds the hardtop is better while the worst being no top. Now if you stripped the interior and removed the spare, seats, carpet, and just about everything else you can think of, you might edge towards the soft top more.
You'll also get some differences from those running a stock jeep compared to those that are lifted. More air under the body will cause drag. Flat fenders will also trap more air at speed. Smaller tire cut through the ir easier then larger ones. Wider flares up front catch the wind more then no flares. Wider rear flares probably help move the air up and over the tire though. What's the difference between the front and rear? Well the front flares are open at the front unlike the rear. This catches the wind. In Europe, the openings at the front are closed off on the TJ. This is done for safety, I believe but also increases the jeeps aerodynamics...
-
I work with a guy who only gets 10 mpg with his 4.0L Cherokee! I feel something is wrong here.
-
I have had the 2.5 in a 94 YJ and got 21 MPG in stock condition. My Sports never got better than 16-17 MPG. MY new 2.4 on it's first tank got 24.9 MPG. This is a combination of highway and mountain road driving. Soft top up.
-
On 33's with 4:11 stock gears, inertia ring on the flywheel, 4.0TB TB spacer, electric fan, stock exhaust.
I get about 12-14mpg. But I have a lot more power out of my mods and don't have to floor it all that often.
Oh I have over 200k on mine as well.