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Throttle response lag, increased idle when warm

Discussion in 'Technical Chat' started by blazermaniac, Apr 14, 2012.

  1. Apr 14, 2012 at 7:08 PM
    #1
    blazermaniac

    blazermaniac [OP] Active Member

    Joined:
    Feb 22, 2012
    Member:
    #73419
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    26
    Gender:
    Male
    First Name:
    Brian
    Oregon
    Vehicle:
    Black 08 TRD off-road 6sp.
    My 2008 v6 manual has the idle continue to rev a bit when shifting; when clutch is engaged, rpm increases a little before dropping. It acts like I'm not quick enough at releasing the throttle. I can actually see the tach go up a few tics before it goes back down. Also, when coming to a stop with clutch engaged, rpm stays higher for 5+ seconds before dropping to normal idle. This only occurs when the engine is warm, when it's cold, rpm drops like normal.

    I have heard this is "normal" to improve emissions. I don't believe that because it behaves differently when cold. Also, plenty of other cars do not have this issue.

    I believe it is a design flaw or other known issue, and those are usually correctable.

    My question is if there is a known fix. For instance installing a cold air intake or other performance parts that has alleviated the problem.

    Here is another thread about the issue started by ScottR:
    http://www.tacomaworld.com/forum/2nd-gen-tacomas/209078-2007-tacoma-throttle-response-lag.html
     
  2. Apr 16, 2012 at 5:45 PM
    #2
    Ga tacoguy

    Ga tacoguy Well-Known Member

    Joined:
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    Rudy
    Augusta Ga.
    Vehicle:
    Extended cab Base model 4 cyl
    Tailgate mod, horn mod,storage door mod
    :) It sounds like your throttle body may need cleaning. I don't know how many miles you have on your Taco, but this is the cheapest fix for this that I know of. Just use the cleaning write up that is here on the technical board and see if it helps your problem. Good Luck.
     
  3. Apr 17, 2012 at 11:42 PM
    #3
    blazermaniac

    blazermaniac [OP] Active Member

    Joined:
    Feb 22, 2012
    Member:
    #73419
    Messages:
    26
    Gender:
    Male
    First Name:
    Brian
    Oregon
    Vehicle:
    Black 08 TRD off-road 6sp.
    Yes, I should start with a cleaning, but with <30K this wouldn't be my first guess. ScottR tried this as well as the TB grounding and it did not work.

    I'm still wondering why there is no problem when it's cold then it appears when it warms up. What kinds of things are going on with the emissions system at that point, like choke, ect. that I could unplug to test?

    thanks for the input.
     
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