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Discussion in 'Performance and Tuning' started by ETaco23, Mar 13, 2009.

  1. Mar 13, 2009 at 12:21 PM
    #1
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Afte having a rough idle and verry crappy MPG's for awhile. I have changed my plugs, and it didnt help, but I changed my fuel filter yesterday and just drove it. the rough seems to be better, lets hope it stays that way. I just gotta check my mpg's next tank. Oh, and the old fuel filter was really dirty! I was in shock how much crap came out of it.

    If the rough idle/low rpm's comes back what should I do next?
     
  2. Mar 13, 2009 at 12:34 PM
    #2
    tacoskim

    tacoskim Tuned By Gadget

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    when was the last time you checked your maf sensor?
     
  3. Mar 13, 2009 at 12:45 PM
    #3
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    about 3-4 weeks ago. I cleaned that and the throttle body.
     
  4. Mar 13, 2009 at 1:17 PM
    #4
    spaghettiedy

    spaghettiedy Well-Known Member

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    Where's the fuel filter on our trucks? Are there multiple fuel filters?
     
  5. Mar 13, 2009 at 3:29 PM
    #5
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    No, Im pretty sure that the new Tacoma's have it in the gas tank, and isnt serviceable.
     
  6. Mar 13, 2009 at 4:49 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yup. Second gens have it in the tank. It can be replaced along with the pump, as they are 1 assembly. Either have to drop the tank, or remove the bed. Neither one is as hard as one would think.
     
  7. Mar 13, 2009 at 5:02 PM
    #7
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Well the rough idle is better but it still drops down to 600 and is rough sometimes. What could I try next?
    -New Wires?
    -PCV?
    -TPS?
     
  8. Mar 13, 2009 at 6:30 PM
    #8
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Bump.......Nothing! ok

    Well I think im ganna try changing my PCV and run some seafoam threw the pcv line instead of the brake booster. Ive done it through the brake booster line twice in the last 4 months or so. It helped a little. Smoked a buch though!:) But since I just changed my plugs would this be a bad idea?
     
  9. Mar 13, 2009 at 6:33 PM
    #9
    wildjerseyfirefighter

    wildjerseyfirefighter I sell fishing and fishing accessories

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    i think you'll be ok, unless your changing them with cheap plugs. Are you checking your gap correctly before installing?
     
  10. Mar 13, 2009 at 6:36 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Replace all the wires. Good idea, if one was bad, may as well replace all of them...
     
  11. Mar 13, 2009 at 6:37 PM
    #11
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    I just changed my plugs, and gapped them. I used the OEM denso's
     
  12. Mar 13, 2009 at 6:39 PM
    #12
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    What wires do you reccomend? NGK or OEM/dealer wires.
     
  13. Mar 13, 2009 at 6:40 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    As for the low idle, Check the EGR first, as this can causse a low idle, and its a cheap fix. Also, check to make sure all your vaccume lines are connected propperly, and not craked. ...WHen its idleing low, turn on the AC. If the idle doesnt increase, or if it drops lower, it could be the IAC.
     
  14. Mar 13, 2009 at 6:40 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I would stay with OEM.
     
  15. Mar 13, 2009 at 6:41 PM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Ok...So you used the twin ground plugs....Did you gap both sides of the plug??
     
  16. Mar 13, 2009 at 6:44 PM
    #16
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    K, thanks! I know if I turn the AC on it will go up and idle gets smoother.
    And may I ask... EGR?
     
  17. Mar 13, 2009 at 6:44 PM
    #17
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Yep! gapped them .035 to .040.
     
  18. Mar 13, 2009 at 7:03 PM
    #18
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    I just did some searching and research. And I think it might be the EGR! I hope so! I will do that and the PCV.
     
  19. Mar 13, 2009 at 7:04 PM
    #19
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Cool....keep us posted..
     
  20. Mar 13, 2009 at 7:43 PM
    #20
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    How much is an EGR valve?
     
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