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sh*t gas mileage around town

Discussion in 'General Tech and Maintenance' started by ericL, Nov 3, 2005.

  1. ericL

    ericL Senior Member

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    I have a jdm b16a sir2 with i/h/e (currently no cat) and on the highway I get around 35-37 mpg but around town I get 15-17 mpg...is the lack of a cat causing shit gas mileage or is it something else? Thanks
     
  2. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    its from stomping on the gas and redlineing it between traffic lights
     
  3. VTECPOWER

    VTECPOWER Senior Member

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    Would having a cat instead of a test pipe increase gas mileage?
     
  4. ericL

    ericL Senior Member

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    Nah, I can't go more than about 1/4 to 1/2 throttle b/c the cops where I am are assholes about loud exhausts...so it's not stop and go...
     
  5. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    what kind of ECU are you running???? might be dumping too much fuel ?????
     
  6. ericL

    ericL Senior Member

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  7. VTECPOWER

    VTECPOWER Senior Member

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    Chipped or anything?
    Check your fuel pressure.
     
  8. ericL

    ericL Senior Member

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    nope no chip, i'll check the pressure later...
     
  9. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    any check engine lights ??
     
  10. ericL

    ericL Senior Member

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    Nada, cleared a knock sensor CEL about a month ago but other than that nothing
     
  11. VTECPOWER

    VTECPOWER Senior Member

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  12. ericL

    ericL Senior Member

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    Just to verify, how do you reset the ecu?
     
  13. VTECPOWER

    VTECPOWER Senior Member

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    1)Have key on "on" position
    2)Take one battery terminal off
    3)Wait 30sec-1min
    4)Re-connect
    5)Turn key on "off" position
    6)Start car to see if code cleared
     
  14. ericL

    ericL Senior Member

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    Yea I reset the ECU after I fixed the CEL awhile ago. My fuel pressure is about 63psi cruising at 3K and about 75psi at WOT...
     
  15. VTECPOWER

    VTECPOWER Senior Member

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    Thats why u get shit gas mileage, should be 40psi at idle with the FPR vacuum hose dis-connected.
     
  16. ericL

    ericL Senior Member

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    Idle it is at around 25 psi, 3k cruising it is at about 63 psi...
     
  17. ericL

    ericL Senior Member

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    Correct me if I'm wrong but after searching around a bit I found common gas mileage problems due to: O2 sensor, plugs/wires/dizzy, bad fuel filter, catalytic converter, MAP, TPS, bad timing, and wrong octane gas.

    It seems like most of these would cause crap gas mileage all the time...whereas I am getting great highway mpg but the around town mpg is suffering...any suggestions as to what to try first...I was thinking fuel filter and throwing on the catalytic converter instead of the test pipe...
     
  18. VTECin5th

    VTECin5th Administrator

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    for what it's worth, i havea testpipe on my b16 powered vehicle and notice no change in gas mileage at all.
    Don't waste your time with that.
     
  19. ericL

    ericL Senior Member

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    k cool, i really didn't think that a test pipe would mess up the gas mileage...
     
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