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Truck running rough still after many new parts

Discussion in '1st Gen. Tacomas (1995-2004)' started by Kauaikakalia, Sep 23, 2019.

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  1. Sep 23, 2019 at 4:46 PM
    #1
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Hi everyone, so I bought a used tacoma 2.7 4x4. It's running great at idle but when I give it throttle it will stutter them misfire sound then die or just bog till I let off the throttle. I put on a new fuel filter new fuel pump new MAF new TPS and new fuel pressure regulator. Please help I'm stumped?? Maybe cat clogged up!!???
     
    Kauaikakalia, Sep 23, 2019
    #1
  2. Sep 23, 2019 at 5:02 PM
    #2
    Black DOG Lila

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    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Welcome to Yodaland
     
    Black DOG Lila, Sep 23, 2019
    #2
  3. Sep 23, 2019 at 5:02 PM
    #3
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Thx
     
    Kauaikakalia, Sep 23, 2019
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  4. Sep 23, 2019 at 5:04 PM
    #4
    BillsSR5

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    BillsSR5 Looking out for #1

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    engines codes?
     
    BillsSR5, Sep 23, 2019
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  5. Sep 23, 2019 at 5:04 PM
    #5
    0xDEADBEEF

    #5
    0xDEADBEEF Swaying to the Symphony of Destruction

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    Did any of those parts change anything about how it runs?


    Also I'd check the ignition coils.
     
    0xDEADBEEF, Sep 23, 2019
    #5
    cruxofthebisquit and Rachelsdaddy like this.
  6. Sep 23, 2019 at 5:07 PM
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    Steves104x4

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    Steves104x4 Well-Known Member

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    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Check the EGR system is functioning correctly
     
    Steves104x4, Sep 23, 2019
    #6
    Rachelsdaddy likes this.
  7. Sep 23, 2019 at 5:16 PM
    #7
    BillsSR5

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    BillsSR5 Looking out for #1

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    BillsSR5, Sep 23, 2019
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  8. Sep 23, 2019 at 5:17 PM
    #8
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Adding new parts only made it run and smooth at idle. But now with new parts: when I start truck I have to feather the gas pedal or it'll die. Then once started it idles great about 1500 then down to like 800 when it kinda warms up.
     
    Kauaikakalia, Sep 23, 2019
    #8
  9. Sep 23, 2019 at 5:20 PM
    #9
    BillsSR5

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    BillsSR5 Looking out for #1

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    get it scanned at AUTZONE maybe theres a code
     
    BillsSR5, Sep 23, 2019
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  10. Sep 23, 2019 at 5:34 PM
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    Rachelsdaddy

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    Rachelsdaddy Well-Known Member

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    Yup, sticking or cruddy egr can do it... I’m also a firm believer in checking the fuel pressure. I used to believe they either work or don’t. Not the case. I have been chasing a drivability issue for a long time. Many musical parts. Finally checked it, was ALL over the place. Replaced it w/ Denso from Rock Auto. My truck runs like an entirely different truck. It actually will keep up with traffic now. Lol
     
    Rachelsdaddy, Sep 23, 2019
    #10
  11. Sep 23, 2019 at 5:36 PM
    #11
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Ok I'll get her scanned and check egr
     
    Kauaikakalia, Sep 23, 2019
    #11
  12. Sep 23, 2019 at 5:37 PM
    #12
    BillsSR5

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    BillsSR5 Looking out for #1

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    best course of action I think
     
    BillsSR5, Sep 23, 2019
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  13. Sep 23, 2019 at 5:53 PM
    #13
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Do you think it could be IAC?
     
    Kauaikakalia, Sep 23, 2019
    #13
  14. Sep 24, 2019 at 1:06 PM
    #14
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    So I scanned it and it reads p0100 A curcuit but it's a new MAF! So ???
     
    Kauaikakalia, Sep 24, 2019
    #14
  15. Sep 24, 2019 at 1:44 PM
    #15
    CD20H

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    CD20H Well-Known Member

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    Magnuson Kompressor, OME lift kit, JBA Headers, junky Sony radio.
    Wires and plugs are your friends in a stumbling engine.
     
    CD20H, Sep 24, 2019
    #15
  16. Sep 24, 2019 at 1:51 PM
    #16
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    But I dunno for this situation especially cause the code
     
    Kauaikakalia, Sep 24, 2019
    #16
  17. Sep 24, 2019 at 1:57 PM
    #17
    RedManRocket

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    RedManRocket Well-Known Member

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    P0100 could also be cause by a vacuum leak. Definitely sounds like lack of fuel from somewhere. Whether is be an improper AFR or just not getting fuel because of something else like injectors etc
     
    RedManRocket, Sep 24, 2019
    #17
  18. Sep 24, 2019 at 2:02 PM
    #18
    Steves104x4

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    Steves104x4 Well-Known Member

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    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    With the engine idling tap the mass airflow sensor lightly with the handle of a screwdriver and if the idle fluctuates the mass airflow is bad or so I hear
     
    Steves104x4, Sep 24, 2019
    #18
  19. Sep 24, 2019 at 5:13 PM
    #19
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    It's a new MAF but I'll try
     
    Kauaikakalia, Sep 24, 2019
    #19
  20. Sep 24, 2019 at 5:13 PM
    #20
    Kauaikakalia

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    Kauaikakalia [OP] Active Member

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    Mahalo for your response. What is the AFR?
     
    Kauaikakalia, Sep 24, 2019
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    RedManRocket[QUOTED] likes this.
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