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truck loses power for a second when floored.

Discussion in '1st Gen. Tacomas' started by GioGuitarDude, Jun 18, 2013.

  1. Jun 18, 2013 at 9:03 AM
    #1
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    1996 3.4l v6 manual transmission x-cab tacoma.
    When I punch it and put the pedal to the floor, my truck feels like it loses and regains power several times in a rapid manner. It almost feels like I'm repeatedly flooring it and then completely letting off the gas several times but very fast. Fuel filter has just been replaced and both differentials, tranny and transfer case liquid has been recently replaced. Spark plugs are new and clutch plate and bearing was recently replaced. Does this sound like a bad fuel pump?
     
  2. Jun 18, 2013 at 9:05 AM
    #2
    nut

    nut she'll ride

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    Welcome! Good luck with fixing this, sounds like trouble!
     
  3. Jun 18, 2013 at 9:07 AM
    #3
    4x4yota

    4x4yota 4wd is awesome

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    Sounds like a miss fire. Did u only replace the plugs and not anything else invovling ignition?
    it could be fuel pump. Cuz a fuel pump can go bad by two ways. Either pressure or volume.
    one wont let the truck start and the other causes lose of power.
     
    Last edited: Jun 18, 2013
  4. Jun 18, 2013 at 9:10 AM
    #4
    95 taco

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    Bilsteins front and rear, front set to 1'' and rear are 9'' 5125's, OMD springs in the rear, CSJumper LED's inside, hard wired inverter.
    Could be a fuel pump, or it could be the air filter, when was the last time it was cleaned?
    Or (less likely IMO) it could be the coils, or wires. ( i can't remember of you have coils or a distributor)
     
  5. Jun 24, 2013 at 5:58 AM
    #5
    Half028

    Half028 Member

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    I'm pretty sure you have coils. Might want to check the ohms on each.
     
  6. Jun 24, 2013 at 6:04 AM
    #6
    WThomas1250

    WThomas1250 Molon Labe

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    Definitely sounds like a misfire. My '98 did something similar when it was in desperate need of a tune-up last year.
     
  7. Jun 24, 2013 at 6:07 AM
    #7
    flatblack

    flatblack Well-Known Member

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    I've never heard of an EGR getting clogged up or going bad on a Tacoma; but, I've had this same problem with others vehicles due to just that
     
  8. Jun 24, 2013 at 6:08 AM
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    Half028

    Half028 Member

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    What all did you replace
     
  9. Jun 24, 2013 at 6:18 AM
    #9
    WThomas1250

    WThomas1250 Molon Labe

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    My mechanic did it. He replaced the spark plugs, plug wires, PCV valve, and ignition cables.
    My truck was only misfing if I let it sit for a week or so. (while I was out of town) At first I thought it was a bad tank of fuel or water in the tank. It happened twice before I got the tune-up. Haven't had a problem since.
     
  10. Jun 24, 2013 at 6:22 AM
    #10
    Swimmerboy2112

    Swimmerboy2112 Well-Known Member

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    Sounds like you need a tune-up.

    I'd do the following;

    replace spark plugs
    inspect the wires
    replace fuel filter
    inspect and replace air filter if needed
    oil change
    clean the throttle body and mass air flow sensor
    inspect the belts and replace as needed
    check the coolant

    Also depending on the mileage now may be the time for a 4x4 service which includes;

    draining and re-filling the front and rear diff (make sure the fill plug comes out first!)

    Also if you have a 5 speed, i'd drain and fill the trans.


    Edit: Just saw that you've done most of what i'd typed. I'm gonna leave this up in case someone else was wondering.
     
    Last edited: Jun 24, 2013
  11. Jun 24, 2013 at 6:23 AM
    #11
    Lumpskie

    Lumpskie Independent Thinker

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    It might be a bad fuel...

    OP: Have you had the problem for more than one tank? Can you put a few gallons of 91 in it and see if it gets better? (Just trying to knock the cheap possibilities out before spending money on parts)
     
  12. Jun 24, 2013 at 1:53 PM
    #12
    nut

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    OP? You still there?
     
  13. Jun 24, 2013 at 1:56 PM
    #13
    MightyMouse-SCT

    MightyMouse-SCT Well-Known Member

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  14. Jun 24, 2013 at 2:09 PM
    #14
    4x4yota

    4x4yota 4wd is awesome

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    Haha this reminds me of my jeep. It had problems starting in the morning. (Yet later in the day it would start. Just figured the jeep wasnt a morning person :D )
    ran 91 octane through it for a week and never had the problem again
     
  15. Jun 25, 2013 at 9:27 AM
    #15
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    Thank you guys for the help!
    I actually FIXED IT :)
    I'm not sure witch one did it, but I cleaned the sh*t out of my MAF sensor and intake system and I also added an extra ECU ground straight to the negative battery terminal. Purrs like a kitten now.
     
  16. Jun 25, 2013 at 10:44 AM
    #16
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    I actually had a bad coil a few weeks ago that was causing it to misfire even worse. Truck runs fine now since I cleaned the MAF. It has 230k miles on it so I'm not surprised that this stuff is finally starting to show some wear. Thanks though man.
     
  17. Jun 25, 2013 at 10:46 AM
    #17
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    Dirty MAF was the culprit. Thanks!
     
  18. Jun 25, 2013 at 10:54 AM
    #18
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    I replaced the ignition coils a few weeks ago along with the plugs. One of the coils was cracked. It ran much better after that but it still hesitated when I'd floor it. I added an extra ECU ground wire straight to the negative battery terminal and cleaned the crap out of my intake and MAF and it runs better than ever now. Prob solved. Thank you guys!
     
  19. Jun 25, 2013 at 10:56 AM
    #19
    GioGuitarDude

    GioGuitarDude [OP] Well-Known Member

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    Cold air intake
    Yeah you're pretty much dead on with that :)
    It ended up being a dirty MAF.
     
  20. Jun 25, 2013 at 11:48 AM
    #20
    nut

    nut she'll ride

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    Glad you got it fixed!! :D
     
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