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I think I messed up...I need TW's help

Discussion in '2nd Gen. Tacomas (2005-2015)' started by OCTaco, Jun 22, 2010.

  1. Jun 22, 2010 at 1:12 PM
    #1
    OCTaco

    OCTaco [OP] Well-Known Member

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    When I bought my Truck (05 V6 4.0 trd or) It had a KNN CAI installed and the guy didn't have the stock oem intake. In order to pass smog I needed the stock oem intake so I looked for one on CL. Here's the thing the intake came from an 07 x-runner. Anyways while I was replacing the knn i decided to clean my MAF Sensor an throtle body. When I started up the truck it rev'd real high and when I attempted to come a stop It struggled to shift down from 2nd to 1st. I figured this was because of me cleaning the throtle body and MAF. Anyways now (2months and 4k miles later) it still has a hard time down shifting from 2nd to 1st. Where did I go wrong? Is it the intake? No light's are coming on so I dont think it's the throtle body or MAF Sensor. All ideas are welcomed.

    My truck has 68k on it. It's automatic.
     
  2. Jun 22, 2010 at 1:17 PM
    #2
    mjp2

    mjp2 Living vicariously though myself Moderator

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    What did you use to clean the MAF sensor? If you used anything that could leave a residue, you definitely messed up. ;)
     
  3. Jun 22, 2010 at 1:19 PM
    #3
    Brunes

    Brunes abides.

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    And since it's been a while I hope you've rechecked the bolts/gaskets/connections all the way thru the system.
     
  4. Jun 22, 2010 at 1:21 PM
    #4
    Natetroknot

    Natetroknot Def Leppard Sucks!

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    Did you have/notice/attach the vacuum hose on the back side of the intake plenum, by the firewall?
     
  5. Jun 22, 2010 at 1:39 PM
    #5
    OCTaco

    OCTaco [OP] Well-Known Member

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    I used MAF cleaner.
     
  6. Jun 22, 2010 at 1:39 PM
    #6
    OCTaco

    OCTaco [OP] Well-Known Member

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    All the hoses seem to be in place and everything is tight.I'm thinking of switching back to a CAI and see if that helps.
     
  7. Jun 22, 2010 at 1:41 PM
    #7
    OCTaco

    OCTaco [OP] Well-Known Member

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    I just spoke to the dealer and their master tech says it's because of the intake. he says intakes on x-runners and different because x-runners are meant for racing? WTF? Can anyone elaborate on this?
     
  8. Jun 22, 2010 at 1:44 PM
    #8
    Natetroknot

    Natetroknot Def Leppard Sucks!

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    X2
     
  9. Jun 22, 2010 at 1:47 PM
    #9
    OCTaco

    OCTaco [OP] Well-Known Member

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    Tried that. I left the truck unplugged for like 30 mins. Any ideas on diagnosing this?
     
  10. Jun 22, 2010 at 2:02 PM
    #10
    Natetroknot

    Natetroknot Def Leppard Sucks!

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    Billy's @ .85, 1.5 Progressive AAL, Leer 100xl, BFG KO2's
    It would be relatively easy to make sure that vacuum hose is there, slid all the way on to both nipples, and not cracked or something.....if you've done that already then I'm at a loss; not trying to be repetitive or disrespectful, just want you to be sure that's not it b/c unless you've got a check engine light on I can't see anything else being the culprit.

    I'm not 100%, but I believe that supplies the fuel pressure regulator with necessary vacuum - which is directly related to your computer controlled shift points in an automatic. If that vacuum line isn't hooked up, you're coasting to a stop while off the throttle, and as far as your 'puter knows you're still on the throttle. Then a secondary (or supplementary) parameter such as wheel speed causes the shitty shift down to first.
     
  11. Jun 22, 2010 at 2:07 PM
    #11
    OCTaco

    OCTaco [OP] Well-Known Member

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    I will double tripple check the vacum hose, is that the one that goes from the passenger side throtle body to the front of the intake, or is it the small one in the back of the intake?
     
  12. Jun 22, 2010 at 2:08 PM
    #12
    OCTaco

    OCTaco [OP] Well-Known Member

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    No man, the closest one with a taco is in Chino Hills with you.LOL
     
  13. Jun 22, 2010 at 2:10 PM
    #13
    Natetroknot

    Natetroknot Def Leppard Sucks!

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    Small one in back. 3/16 I believe, about 6-8 inches long. It's easy to miss, particularly if you didn't receive it from who you scored the intake from.
     
  14. Jun 22, 2010 at 2:12 PM
    #14
    OCTaco

    OCTaco [OP] Well-Known Member

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    You know what, now that you mention it, that hose is long,(longer than stock). Reason being that when i removed the k&n intake i didn't have the stock short hose to replace it. I will cut it down today after work and see if that does it. Thanks boss.
     
  15. Jun 22, 2010 at 3:03 PM
    #15
    OCTaco

    OCTaco [OP] Well-Known Member

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    I just cut down the line and it's a no go. Any other advice?
     
  16. Jun 22, 2010 at 3:26 PM
    #16
    hwysrfr

    hwysrfr Well-Known Member

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    Did you take out the maf and make sure you didn't break one of thos tiny wires, that will ruin your day.
     
  17. Jun 22, 2010 at 5:21 PM
    #17
    OCTaco

    OCTaco [OP] Well-Known Member

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    No I haven't, I guess I should look at it. What should I look out for?
     
  18. Jun 23, 2010 at 4:22 AM
    #18
    Wattapunk

    Wattapunk Stay lifted my friends !

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    You can pull a spark plug to see if its running too rich/lean. (black=rich, white=lean) One of the symtoms of a malfunctioning MAF sensor. I read somewhere that you can also check voltage at the sensor with a multi-meter, I am not quite sure what voltage it should read but prob. in the 5 volt range.
    I think you may have have bought a bad MAF sensor, especially used on CL. Good luck.. Here's a sparkplug chart : http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

    [​IMG]
     
  19. Jun 23, 2010 at 7:04 AM
    #19
    OCTaco

    OCTaco [OP] Well-Known Member

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    Thanks for the advice but the MAF is actually the stock one that came with the truck. The only thing I replaced was the K&n intake with the stock OEM intake.
     
  20. Jun 23, 2010 at 7:30 AM
    #20
    T0LLPHR33

    T0LLPHR33 Well-Known Member

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    S1N C1TY...(from Hilo, HI)...
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    BSP TRD Off-Road
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    that's full of BS right there...

    the OEM intakes on the stock 1GR-FE are exactly the same as on the 4x4 Tacomas...

    tell that master mechanic he needs to learn more about the products he works with cause he's full of sh*t...I know I wouldn't trust him working on my vehicle had he told me that...
     
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