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4 Bangin, Fuel Sippin, Full Tank Challenge!

Discussion in '4 Cylinder' started by 2TRunner, Aug 29, 2011.

  1. Mar 29, 2013 at 6:33 PM
    #841
    iroh

    iroh Well-Known Member

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    tonneau
    Sorry, post was primarily for worthywads, I figured he'd know what I was saying.

    nice-on = no internal combustion engine (but it's on) = neutral coast, engine running.
    EOC = engine off coast, can be synonymous with FAS = forced auto stop
    DFCO = dynamic fuel cut off (fuel cut when decelerating in gear)
     
  2. Mar 29, 2013 at 7:31 PM
    #842
    Rackster

    Rackster Well-Known Member

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    Tough to get a respectable number (relative to the Tacoma) with the big rig. Going from my RWD Ranger to the 4x4 Tacoma, I've given up a couple of MPGs. But I have a truck that fits my needs much better.
     
  3. Mar 29, 2013 at 9:44 PM
    #843
    Kirk1589

    Kirk1589 Well-Known Member

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    I know what it is. LOL idc about the delay or whatevr in the throttle I have a cable attached to mine and not a dumb wire
     
  4. Mar 30, 2013 at 7:24 AM
    #844
    iroh

    iroh Well-Known Member

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    tonneau
    I miss that cable sometimes. So little to go wrong and so cheap to fix if something does.

    Nah I was talking about the logic programmed into the 4.0L engine vs the 2.7L engine. Even though they're both throttle by wire, there's a massive difference in when the fuel cut kicks in.

    With the 4.0L (manual), the engine has to be spinning at least 1600 rpm in gear when throttle is lifted which often necessitates downshifting to trigger it; the throttle plate closes immediately, but for about two seconds it's still giving fuel and not much happens in the way of engine braking then. After that two seconds the loop indicator goes open, the truck lurches, and it slows down. It starts the fuel again at 1200 rpm.

    With the 2.7L, it's so much more simple. Anything between 1000 rpm and some point between 2000-2500 rpm (haven't nailed down its exact spot yet) engages the fuel cut if the throttle plate is closed and there is no delay. I've run into the upper cutoff coming off the highway - no DFCO until sometime on the off-ramp.
     
  5. Mar 30, 2013 at 11:24 AM
    #845
    Rich91710

    Rich91710 Well-Known Member

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    I've been keeping an eye on mine and I'm not going into open loop at higher speeds unless I'm braking with moderate force.

    At 40mph, throttle closed will go into open loop, but rolling down hill at 70, it won't go into open loop until I apply enough braking to make for a noticeable deceleration.
    Releasing the brake will cause it to go back into closed loop. This is all happening in the 1800-2200rpm range.

    Your manual may be programmed differently.
     
  6. Mar 31, 2013 at 1:00 PM
    #846
    cwoodruff08

    cwoodruff08 New Member

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    None
    That's what surprised me about getting 22.6 mpg on mine. On the way to work Im generally 45-70 all the way there. Like you say though the drive home sucks big time. Stop and go to max 40 if I'm lucky. I hate LA traffic!!!
     
  7. Mar 31, 2013 at 2:25 PM
    #847
    Rich91710

    Rich91710 Well-Known Member

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    45-70 is perfect. Pickups and SUVs start dumping fuel like a 767 as you move above 65.

    La Mirada? You've got to be dealing with the 5 or the 91.
    You have my sympathy. I lived in Brea and worked at Douglas... 91 sucked even back in 1990.
     
  8. Mar 31, 2013 at 4:51 PM
    #848
    iroh

    iroh Well-Known Member

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    tonneau
    I paid close attention to that loop indicator today. Every time it went into open loop at 1900 rpm (about 53mph actual in 5th). I tried it in 4th as well just before I got home and it was still 1900 rpm.

    So you 5MT guys, if you downshift to slow down, keep in mind that if its spinning 2000 rpm or more you're still burning gas.

    On another note, round trip to visit family this weekend was 190 miles; I set cruise at 72 mph actual o
    the way there and 68 mph on the return (75 and 71 on the dial) and the ultragauge is reading 23.3 mpg average. That should be close; last fill was 14.69gal, UG estimated 14.7. Last time I tried that with the six speed it said 14.6...ouch...
     
  9. Mar 31, 2013 at 7:08 PM
    #849
    Kirk1589

    Kirk1589 Well-Known Member

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    Maybe you should buy a hybrid cuz why do u need good mpg in a truck? Seems like a waste of time. I just drive mine. Sometimes I get 19 other time 27
     
  10. Mar 31, 2013 at 7:19 PM
    #850
    iroh

    iroh Well-Known Member

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    tonneau
    The joys of lake effect snow prevent that. I often get to drive through snowfall that no hybrid (except a yukon) can traverse.

    If I could afford to move out of the snowbelt, I would SO have a civic hybrid. Cleaning deer blood out of the trunk would be a pain though.

    Besides, it's just the way I drive, no matter what it is... I enjoy the challenge.
     
  11. Mar 31, 2013 at 7:45 PM
    #851
    91r100gs

    91r100gs Understand the Voice Within

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    I would love it if they made a hybrid version of the 4 cyl Tacoma. It would boost power as well as MPG. In my current driving situation, which is 3.5 mile trips twice a days, never exceeding 40 MPH, I would gain 7 to 10 MPG because I would not be using fuel for over half my trip. Would actually buy one if it came in at $2000 or less extra. Beside it would improve the air you breathe. Just thinking and dreaming out loud.
     
  12. Mar 31, 2013 at 8:14 PM
    #852
    Kirk1589

    Kirk1589 Well-Known Member

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    I dont plan to lift mine or anything. Women just got a Mazda so I'll mod that, I like my 10 year old truck thats being taken to the grave I'm keeping it till it's last breath. As for a 2nd vehicle I'll have a 2nd bike soon.

    I pay attention here and there, I have bad tanks and good ones it all depends if I rush or plan my trips I make.
     
  13. Apr 1, 2013 at 6:28 AM
    #853
    BuzzardsGottaEat

    BuzzardsGottaEat "Pick up some speed.. You'll make it."

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    This and this^

    I always chuckle when guys on here get pissy about anyone mentioning fuel economy. I try to get the best FE out of any vehicle I drive, just for fun, and the cash saved is a perk. Plus tracking it lets me know what my vehicle is up to. Just wanted to share in the sentiment :)
     
  14. Apr 1, 2013 at 10:26 AM
    #854
    worthywads

    worthywads Well-Known Member

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    This ^

    I like the challenge and tracking like you. It uses less gas but I actually get paid way more for the few miles I put on for work than I spend in gas. I gas up about every 6 weeks and with safeway discount a tank is less than $50. I average $80 a month for the 180 miles I put on for work.

    I also think it's patriotic to use less fuel if I can. :crapstorm:
     
  15. Apr 2, 2013 at 4:07 AM
    #855
    Rackster

    Rackster Well-Known Member

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    As you know, those of us who dabble about at CleanMPG.com try to drive our vehicles efficiently and effectively. Concern about our environment on a local and global scale is everyone's responsibility, but some folks contribute in different ways, at different points/times in their life, or not at all. Degrees of selfishness and awareness I suppose. But the challenge to do more with less should be a goal in many arenas beyond fuel efficiency. I see the folks in other threads mostly where they complain about a fellow enthusiast asking questions about fuel optimization as if they didn't know they bought a truck without regard for the circumstances. A bit a bravado and ignorance. Mostly have to ignore this as a good many of them will come to that 'point' and 'time' and realize the error in thinking. Also, these folks may be contributing in other ways to the common good of mankind. You never know. So as I don't presume to know all that they do, I ignore most comments. However, I have my moments of weakness where I'll throw in my 2 cents and hope for the best.

    Fuel Optimization: enjoy the challenge, the cleaner air, and the extra money in your pocket!!
     
  16. Apr 9, 2013 at 8:58 AM
    #856
    DBWrecks

    DBWrecks Active Member

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    I like this thread, very interesting assuming everyone is posting honestly.
     
  17. Apr 9, 2013 at 4:51 PM
    #857
    91r100gs

    91r100gs Understand the Voice Within

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    What point would we have in fibbing? Check out my and others Fuelly.com account. Some of us have made over 100 entries over several years and ten of thousands of miles. I just wish I got the 25+ I was getting, as my driving conditions have changed since last fall. Now 85% of my trips are less than 4 miles.
     
  18. Apr 10, 2013 at 4:39 PM
    #858
    Rackster

    Rackster Well-Known Member

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    MPGs are picking up!! A week or two more and then regular gas again?? I sure hope so.
     
    Last edited: Apr 20, 2013
  19. Apr 10, 2013 at 6:43 PM
    #859
    MikeCB600F

    MikeCB600F RCLB4CYL W/NOFN options

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    My MPG seems to be picking up also. I was getting 170 to 180 miles at the half tank mark. Today at half tank, I had 195 miles.:)
     
  20. Apr 10, 2013 at 7:49 PM
    #860
    Taco Pete626

    Taco Pete626 Well-Known Member

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    Gas mileage is picking up here too. Overall, I am seeing about 2 MPG increase.
     
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