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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.

  1. Sep 25, 2019 at 3:40 PM
    #41
    Rachelsdaddy

    Rachelsdaddy Well-Known Member

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    Yes. Check your fuel pressure. I understand you replaced the pump but it doesn’t mean it’s working properly.
     
  2. Sep 25, 2019 at 3:43 PM
    #42
    Rachelsdaddy

    Rachelsdaddy Well-Known Member

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    That’s what mine was doing... fuel pressure was all over the place. Even temperature would make it worse or better.
     
    RedManRocket[QUOTED] likes this.
  3. Sep 25, 2019 at 5:44 PM
    #43
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Ok so fuel pressure is at 75. But it slowly leaks down
     
    Black DOG Lila likes this.
  4. Sep 25, 2019 at 6:20 PM
    #44
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Not to sure what is supposed to be at?? The fuel pump doesn't turn on unless the truck is running once truck dies pump shuts off
     
  5. Sep 25, 2019 at 8:28 PM
    #45
    RedManRocket

    RedManRocket Well-Known Member

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    Where did you test the fuel pressure at
     
  6. Sep 25, 2019 at 8:54 PM
    #46
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    The

    fuel line that's coming right out the fuel tank but in the engine bay.
     
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  7. Sep 25, 2019 at 9:06 PM
    #47
    RedManRocket

    RedManRocket Well-Known Member

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    And how slowly does it lose pressure, because there's a vent in the fuel tank I believe
     
  8. Sep 25, 2019 at 9:09 PM
    #48
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    It took about 3 mins to leak down all the way
     
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  9. Sep 25, 2019 at 9:11 PM
    #49
    RedManRocket

    RedManRocket Well-Known Member

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    Hmmm, honestly idk if that's within spec. Hopefully someone else will chime in
     
  10. Sep 25, 2019 at 9:13 PM
    #50
    Bleep100

    Bleep100 TOYOTA 4 LIFE

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    Take a plug wire off and start it and see if it runs the same or worse . One at a time and check them all . If it runs the same with a wire off you found a problem .
     
  11. Sep 25, 2019 at 9:19 PM
    #51
    RedManRocket

    RedManRocket Well-Known Member

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    Good way to test ignition coils/distributor wires ^^^
     
  12. Sep 25, 2019 at 9:24 PM
    #52
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Did all that runs like crap if I disconnect anything to do with spark
     
  13. Sep 25, 2019 at 9:25 PM
    #53
    0xDEADBEEF

    0xDEADBEEF Swaying to the Symphony of Destruction

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    Have a look at this.
     

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  14. Sep 25, 2019 at 9:27 PM
    #54
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Will check it out
     
  15. Oct 1, 2019 at 2:38 PM
    #55
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Ok so it's kinda crazy to do all this with out reason, took it to a guy and he's said did anyone say anything about brake booster. So I guess the brake booster cares big time. And if leaking it'll pull from your intake manifold and mess stuff up.?? Anyone ever have this issue??
     
  16. Oct 1, 2019 at 3:03 PM
    #56
    Rachelsdaddy

    Rachelsdaddy Well-Known Member

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    I’ve heard about it, if the diaphragm is leaking you will certainly sucking unaccounted for air, plug the line, see if it improves....
     
  17. Oct 1, 2019 at 3:49 PM
    #57
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Exactly
     
  18. Oct 6, 2019 at 4:20 PM
    #58
    Kauaikakalia

    Kauaikakalia [OP] Active Member

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    Ok so I did the test didn't help. Did egr delete. Didn't help???? So stumped man!!!
     

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