Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Boy...this sucks!!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by thatK30guy, Dec 27, 2001.

  1. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    I filled up gas tonight and kept track from the last time I filled up. [​IMG]

    The last time I filled up, the odometer showed 1855 miles. Tonight it showed 1915 miles. So thats 60 miles even.

    The kicker is, I filled up 14.7 gallons of gas!!! [​IMG] [​IMG] [​IMG]

    That comes to 4.08 mpg! And, that was all city driving. I never went out of town during this span on the last tank of gas. [​IMG]

    What can I do to get this mpg UP? I know plenty of others on the site running pretty much the same set up I've got, and Blazers weigh just the same as my K30 does. Maybe its time to swap a smaller camshaft in?



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  2. GONZO2

    GONZO2 1/2 ton status

    Joined:
    Jul 17, 2001
    Posts:
    137
    Likes Received:
    0
    Location:
    formerly Great Falls, MT now Lompoc, Ca
    that does suck!
    start with the basics, good engine tune.
    is your speedo corrected for the tires? that makes a big difference.


    <font color=blue>85 blazer</font color=blue> 4" lift, 35" pro comp mt, locked out back
    <font color=blue>88 blazer</font color=blue>mostly stock
    <font color=blue>99 30th ann. TA</font color=blue>
    <font color=blue>79 TA</font color=blue>
     
  3. 2Dogs

    2Dogs 1/2 ton status Premium Member

    Joined:
    May 4, 2001
    Posts:
    3,470
    Likes Received:
    35
    Location:
    Ca
    Yikes!!!! And I thought I had sh1tty mileage.....

    Is this one of the trucks? Do you have smog restrictions? Increase the compression ratio and other efficiency things maybe...? (roller EVERYTHING if you have the extra $$$$)

    Dave

    Horn Broken... Watch For Finger.
    <a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>http://coloradok5.com/gallery/Daves-Pics</a>
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    Tune up is very recent. Runs very good and strong, too. Also very quick and torquey.

    Speedo is also correct. The owner before me already had that recalibrated to compensate for the 35's.

    I may need to downsize to a SBC!!! [​IMG] [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    Yep, this is the black and silver '85 K30. No smog crap on it at all. (except for the smog pump, which is still hooked up) Roller EVERYTHING would be pushing it....my wife would not let me do anything to something that runs good. [​IMG] In her words, "if it isn't broke, don't fix it!" [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,180
    Likes Received:
    1,388
    Location:
    E-town baby!
    How short are your trips? I'm thinking that if that 454 is always running with the choke it will never get great mileage. I know around town my mileage isn't spectacular...usually under 10 MPG...but I also tend to drive just a short distance to work and back. By the time it warms up I'm at work.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  7. SKI-'84K5

    SKI-'84K5 1/2 ton status

    Joined:
    Oct 11, 2001
    Posts:
    175
    Likes Received:
    0
    Location:
    Imlay City, MI
    just remind her it's better to fix it b4 it breaks you
     
  8. SKI-'84K5

    SKI-'84K5 1/2 ton status

    Joined:
    Oct 11, 2001
    Posts:
    175
    Likes Received:
    0
    Location:
    Imlay City, MI
    just remind her it's better to fix b4 it breaks you
     
  9. RESTORE89

    RESTORE89 1/2 ton status

    Joined:
    Jan 31, 2001
    Posts:
    548
    Likes Received:
    0
    Location:
    CHAS SC
    it is time to swap something!!!!
    what is your setup?

    It needs a bigger motor.
    what's in it now?
    doen't matter it NEEDS A BIGGER MOTOR
    89 350tbi/700r4h/np208/4.11's
     
  10. DesertDueler

    DesertDueler 1/2 ton status

    Joined:
    May 23, 2001
    Posts:
    3,106
    Likes Received:
    0
    Location:
    Phoenix, AZ
    Hey you get worse gas milage than my Firebird :) I get 5 mpg. Of course I mix 91 and 110 so it more expensive for me :) Try driving for a long period of time and see what happens.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  11. michaelm

    michaelm 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    872
    Likes Received:
    0
    this time of year in town driving usually consists mostly of idle time.
    not truly indicative of engine trouble.
    swap a cummins turbo diesel into it.
    only 360ci to feed at idle
     
  12. Sparky87k5

    Sparky87k5 1/2 ton status

    Joined:
    May 6, 2001
    Posts:
    726
    Likes Received:
    0
    Location:
    Lynden, Washington, 4 miles from Canada
    You might look for fuel leaks, particularly towards the back by the tank. Could someone be stealing fuel? How much time is spent idling or warming up? Could the fuel pump diaphram be going bad (manual pump) and leaking fuel into the engine?

    87 K5, 427BBC,D60 & 14BFF, NV4500, NP208, TSM disc's,
     
  13. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    My short trips are 5 blocks to work. [​IMG] Yeah, the choke is running to and from work. It's not even warmed up when I get there either. [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  14. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    I need a bigger motor?!?! [​IMG]

    Let's see how much bigger I can go OVER a 454..........502!! [​IMG] Yeah, right! Mucho $$$$$!!!!!



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  15. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    You ask, "What can I do to get this mpg UP?". The answer is simple, sell it and get a ricer! [​IMG]

    I agree that it is probably just you running around short trips. In town is always bad. This time of year it is worse with traffic and cold weather keeping the choke in longer. Add to that the 454 (and big tires) in stop and go traffic and I KNOW you don't ease around. Plus, you say the guy before you had it recalibrated but do you know it is right? Add all this up (especially with a slightly slow speedo/odo) and it is perfectly understandable to me. Take a trip in it after verifying the speedo calibration and then worry about it if it still looks bad.

    Russ

    85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked
    Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.
     
  16. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    I have driven a long period of time (on highways to other towns) and I never saw the mileage get better than 6 mpg. [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  17. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    Mike, sorry, no Dodge stuff in my truck! [​IMG]

    If I were to diesel this truck, I would like to figure a way to get the new Duramax to work in it!! [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  18. shawnboy

    shawnboy 1/2 ton status

    Joined:
    Jun 22, 2001
    Posts:
    468
    Likes Received:
    0
    Location:
    Toronto, Canada, eh.
    A 502 would produce a pretty wild ride but who could afford it? I think I'd invest in a locking gas cap first.
    Shawnboy.

    <font color=red>If you are having too much fun it's probably illegal.</font color=red>
     
  19. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

    Joined:
    Jun 16, 2000
    Posts:
    1,932
    Likes Received:
    0
    Location:
    Sims, NC
    I have your solution!

    Swap me the big block for my new small block!! [​IMG]

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  20. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    No fuel leaks anywhere either. This truck is very clean throughout.

    No person in this town has the balls to even try to steal gas, let along ANYTHING, from me or my place! [​IMG] I will let you come to your conclusion to WHY no one has the balls to do that! [​IMG]

    Not sure on the diaphragm either. The carb is a fairly new Edelbrock #1904 installed about a year and half ago. Would need to check it out sometime anyways.



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     

Share This Page