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97 Tacoma surges at a stop

Discussion in '1st Gen. Tacomas (1995-2004)' started by justalilcrazy625, May 14, 2009.

  1. May 14, 2009 at 7:09 AM
    #1
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    '97 2.7L :)
    I tried posting this on toyotanation.com, but apparently nobody has any idea, or they're too ignorant to say anything. They've never really helped me out, anyways, here's the problem..

    So, my 97 Tacoma, w/ the 2.7L in it blew a head gasket back in November. Got that fixed, changed both o2 sensors, checked the cat, its good. Exhaust manifold was cracked so I had to get another.

    Now, Somehow when I was taking the intake manifold/throttle body off of the engine before I took the head off to change the head gasket, one of the wires came out of the plug for the IAT sensor. I didn't realize that it was this until I got the whole thing back together and started driving it, had to turn up the idle for it to actually idle, then it idled right. it threw a CEL, but it was drivable, but it wasn't the same. It didn't have the same pep and wanna get up and go. Which was Idle Air Temperature Sensor Malfunction.. so I pulled the throttle body off and saw that the wire was out of the plug.

    Anyways, I got the plug fixed and hooked it all up. High idle, I think CRAP. But, then I realized that in order to get the temperature up for the o2 sensors and catalytic converter its gonna idle high for a few mins then go back down, but it was never up to 2k, it always idled at about 1500 or so.

    But, now when I come to a stop it surges kinda, then stops. But it does this everytime I stop. Anyone have any ideas?

    Sry its so long..
     
  2. May 14, 2009 at 7:15 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Im not sure why it would surge on ya like that.....All the vacumme lines are connected propperly?
     
  3. May 14, 2009 at 7:24 AM
    #3
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    '97 2.7L :)
    As far as I know they are. Didn't surge at first when I changed out the head gasket and put it together, started after I fixed that sensor. I know there's an exhaust leak at the donut gasket right off the exhaust manifold, but I'm not sure that would cause it to surge. As it had a cracked exhaust manifold and a few other exhaust leaks before the HG blew.
     
  4. May 14, 2009 at 7:25 AM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Hmmm......Not sure. Fix the exhaust leak, though.....not sure if it would help the surging..........
     
  5. May 14, 2009 at 7:31 AM
    #5
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    I'm gettin' there. I'm in the process of helping my dad build a lowrider, 2wd 89-95 body style dually pickup. it's gonna be sweet. :cool:
     
  6. May 14, 2009 at 8:51 AM
    #6
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    WHOA, female wrencher. Sweet!!

    Auto or manual?
     
  7. May 14, 2009 at 9:00 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Says manual in her description....:p
     
  8. May 14, 2009 at 9:04 AM
    #8
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Damn you and your excessive attention to detail.

    How are you approaching the stops? In nuetral clutch disengaged or clutch engaged?
     
  9. May 14, 2009 at 10:48 AM
    #9
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    Yea, it's a 5 spd. depends on the stop. I'm out the country so every stopsign is different. Usually downshift to 3rd then take it outta gear and coast.

    I'm for some reason thinkin' it may be a vaccuum leak, might have something to do with the throttle body having to come off to fix that sensor.. I'm not lookin' at the motor right now, but I believe vacuum lines do come from the brakes to the throttlebody..
     
  10. May 14, 2009 at 10:50 AM
    #10
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Is there a possibility of a damaged seal?
     
  11. May 14, 2009 at 10:52 AM
    #11
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    I won't drive it unless it's a manual. ;):p

    here she is. :)

    [​IMG]
     
  12. May 14, 2009 at 10:53 AM
    #12
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Oh my god I think I am in love...........
     
  13. May 14, 2009 at 10:53 AM
    #13
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    Damaged seal where?
     
  14. May 14, 2009 at 10:56 AM
    #14
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    On the intake manifold/throttle body, where it mounts to the block.

    Another possibility would be a damage/worn/dried out hose.

    Everything you are discribing seems like an air leak.
     
  15. May 14, 2009 at 10:57 AM
    #15
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    I know the gasket that goes between the intake manifold and throttle body is new, I got the whole gasket kit when I did the HG. And I just replaced both coolant lines that go from the throttle body to the block, I know that wouldn't have much to do with it, but I'll have to check the hoses over and see if they're dryrotted. She's 12yrs old, so there's a possibility. I just wish she'd start runnin' like she did before the HG blew.
     
  16. May 14, 2009 at 11:00 AM
    #16
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    5100's all on fours
    Ain't nothing like a sweet runnin' first gen!!! WHOOP!!!!!!!!
     
  17. May 14, 2009 at 11:02 AM
    #17
    BSPDX

    BSPDX Well-Known Member

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    My guess with the age of truck, I would start looking at all the vacuum lines...
     
  18. May 14, 2009 at 11:04 AM
    #18
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    '97 2.7L :)
    man she's got 235K on her and she runs better than my uncles 06 v6 taco, outdoes it in the mud too. 3rd place in the first bog, made it 42ft. farther than my dad in his lifted toyo pickup w/ detroit lockers.


    (I come from a Toyota family. My dad, stepmom, step sister, and me plus my gram and all aunts and uncles drive toyotas... hahah ):thumbsup:
     
  19. May 14, 2009 at 11:04 AM
    #19
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    5100's all on fours

    Hell, she ain't even broke in yet.
     
  20. May 14, 2009 at 11:06 AM
    #20
    justalilcrazy625

    justalilcrazy625 [OP] Got the yota feverrrr.

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    When I get this problem fixed she should be good for another 200k if not more. :D
     
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