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REALLY low idle, how to adjust???

Discussion in '1st Gen. Tacomas (1995-2004)' started by yummjake, Sep 7, 2010.

  1. Sep 7, 2010 at 4:00 PM
    #1
    yummjake

    yummjake [OP] Well-Known Member

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    Okay, I came up to stoplight this morning on the way to school and after i came to a complete stop, my truck's RPMs dive, to around 580s- 640s (scangauge). I am wondering if there is a way to fix this, other than keeping my revs up, the "normal for tacoma's with the 3.4L is around 750, right? Any and all help is greatly appreciated. Thanks
     
  2. Sep 7, 2010 at 4:03 PM
    #2
    ktmrider

    ktmrider Senior Member

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    if its not coughing or stalling theres no reason to adjust it
     
  3. Sep 7, 2010 at 4:05 PM
    #3
    96er

    96er Sport Rally'er

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    I remember in my '93 there was a screw that adjusted the idle up or down. Not sure if it's present in the tacoma, but I was able to go from 500 to 1000 rpms and back.

    However, I do suspect your problem is deeper than an idle adjust. Could be PCV valve? Bad plugs? Gummed up throttle body?
     
  4. Sep 7, 2010 at 4:13 PM
    #4
    Taco76087

    Taco76087 Well-Known Member

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    why two threads?
     
  5. Sep 7, 2010 at 4:49 PM
    #5
    yummjake

    yummjake [OP] Well-Known Member

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    CRAP!, my internet froze and i didn't look to see if it posted or not, sorry.:(
    The PVC valve should be fine, i BELIEVE that we replaced it when replaced the engine, could be wrong. Where would i look for the idle adjustment screw-thingy, haha. Just to check, thanks for the help. Any other ideas/ possible solutions are always welcome. Again, sorry about the other thread.
     
  6. Sep 7, 2010 at 5:23 PM
    #6
    MowTaco

    MowTaco Well-Known Member

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    I've heard Sea Foam can help smooth out idle... Mine sometimes dips for no apparent reason too, to the point of "shuddering" like right before you kill it from not enough juice on a start. I just actually came in from adding sea foam to the crank case and will be inducing through the vac line later this week. I'll let you know if the idle shudder goes away, although it doesn't do it consistently now.
     
  7. Sep 7, 2010 at 5:56 PM
    #7
    Taco76087

    Taco76087 Well-Known Member

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    No big deal lol.
     
  8. Sep 7, 2010 at 5:59 PM
    #8
    04trd

    04trd Well-Known Member

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    higher revs? step on the little peddle on the right of the brake :) sorry haha i am just bein a smart ass, i have no idea what the problem could be
     
  9. Sep 7, 2010 at 9:11 PM
    #9
    AKTacoma

    AKTacoma Dedicated Crew Chief

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    what all accessories do you have on if any when your idle is dropping? (A/C, amp, sub whatnot)
     
  10. Sep 7, 2010 at 9:37 PM
    #10
    Digiratus

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    Those numbers seemm normal for an auto that is in gear. Mine is about 600 sitting at the light, in gear, foot on the brake. If I put it in neutral the rpms go up to 750.
     
  11. Sep 8, 2010 at 7:21 AM
    #11
    96er

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    Mine is 750 at all times at idle...never wavers unless a/c is on then 900
     
  12. Sep 8, 2010 at 4:27 PM
    #12
    StAndrew

    StAndrew Wait for it...

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    Mine is about the same. 500-600. As long as its smooth, you shouldnt have to worry.
     
  13. Sep 10, 2010 at 6:45 PM
    #13
    yummjake

    yummjake [OP] Well-Known Member

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    :censored::frusty:Okay, so i heard a weird noise from the launch from a stoplight (was taking it easy) and as soon as it got to about 2k, clunk, clunk, clunk, really fast, so when i got to school and put it in park, popped the hood, everything seemed fine, but i was nervous all day, took it home, took my dad for a ride, to let him hear it, and he shook his head in anger and frustration, and said two words " bent rods". He took it to the shop the next day and the mechanic said the same thing. SOOOOoooooo, back to square one, luckily, the engine was still under warrenty, we are hoping that they will honor it, they should, but we are going to let a shop take care of it this time around. There are days that i really have to think, " i loved driving this truck", when it ran good for the first two days, then it was all down hill. I still think that I am coming out ahead, but, it's really hard to see the light at the end of the tunnel.:(
     
  14. Sep 10, 2010 at 8:11 PM
    #14
    Digiratus

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    Sorry to hear about the setback Man! But that is all it is, a setback.
     
  15. Sep 10, 2010 at 10:46 PM
    #15
    MowTaco

    MowTaco Well-Known Member

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    That sucks... don't think Sea Foam will un bend things...
     
  16. Sep 13, 2010 at 1:20 PM
    #16
    yummjake

    yummjake [OP] Well-Known Member

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    i don't think seafoam will unbend things, but it was on sale the other day at Northern for around 6.XX. Anyways, we got in touch with the company and they said that we could either take it out and and send it back and pay 300 (I believe some of that is shipping) and that they would replace anything that was messed/bent/broken in the engine and send it back to us, or that we could have a shop take it out, send the shop the parts and have them install anything broken or messed up, we'll do it ourselves and send 300. thanks for all the help.
     
  17. Sep 13, 2010 at 1:54 PM
    #17
    chmura

    chmura Well-Known Member

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    Your are fuel injected no need to adjust.

    If idle is out of spec then something is wrong.
     
  18. May 2, 2013 at 9:02 PM
    #18
    drewberticus

    drewberticus Member

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    I was having the same problem and fixed it by replacing my brake booster. I have a 1996 Toyota Tacoma v6 3.4L 4x4.
     
  19. Nov 18, 2017 at 7:07 AM
    #19
    Lester97Moneypit

    Lester97Moneypit Member

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    Rubber Stop 004.jpg Rubber Stop 003.jpg Gas Pedal Adjust.jpg Rubber Stop 003.jpg Rubber Stop 004.jpg
    I had most of the normal maintenance done to correct my low idle problem. Thinking back though, I remember finding a rubber piece on the floor near the gas pedal. I just looked around but could find nothing wrong. I started hearing a slight click when I let off of the gas pedal. One day I got under the dash with a flashlight and saw a small hole behind the gas pedal return arm. I reasoned that if this rubber bump-stop was missing, the gas pedal might be going too far and lowering the RPMs to the point of stall/dying. I know the AIC can also be the culprit but the rubber-stop needed to be replaced anyway.
    I bought new rubber pieces that I thought I could never find. As it turns out they can be purchased for about $5 for a bag of 5.
    I unscrewed 2 screws at the gas pedal spring, and moved the accelerator apparatus off to one side.
    I opted for the same size rubber and after some grease and small cuttings, at opposite sides, the nipple finally went in to the hole and now it works as expected.
    Sorry about all the duplicate pics. Not my fault.
     
  20. Nov 18, 2017 at 9:48 AM
    #20
    arcenik

    arcenik TRD

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    Our trucks have no idle adjustment. Your gas peddle will not lower your idle. Your idle is not adjusted by holding the throttle blade open. The throttle blade should be closed at idle. Having Slack in your throttle cable does nothing. The IAC controls idle, if you have an issue you should clean it.
     

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