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IDLE Blocked at 3000rpm [HELP]

Posted by Heryst78, Mar 11, 2018

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  1. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    Hi guys :)

    I have a problem with my 2G GST DSM.

    Before continue, I have Checked for vacuum leaks, nothing except a little leak at the BISS screw.
    All my TB gasket are brand new.

    My problem is this one :
    When the engine is cold, and I start the car, the IDLE is at 1200rpm and drop to 900rpm.
    I’m going to drive, and After few minutes (I pretend when the engine is fully warm), IDLE drops to 3000rpm, sometimes less, sometimes more.

    It stays blocked, and when i drive, if I’m in 4th speed for example, the speed will automatically up to 3000 rpm too

    Does someone had the same problem ?

    Thanks a lot
     

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  2. jakk220

    jakk220 Proven Member

    1,012
    146
    Joined Nov 13, 2010
    Akron, Ohio
    Sorry I am having a little trouble understanding your issue, but I had something that resembles what you are stating when my throttle cable was sticking. Try checking the adjustment at the throttle body (the 2 bolts holding the cable on) and also try lifting up on the pedal and see if it goes down at all. Worth a shot since it is an easy thing to check.
     
    My DSM:
    1997 Eagle Talon N/T (sold)

    Autocross Build

      manual
    1993 Mitsubishi Eclipse GSX

    Street Build

    16g   manual
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  3. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    Hello :)

    Yes i will Check the TB cable but I already adjust it... maybe it is to hard I will check it
    I will check my ISC too

    My AFR is very bad to, I don’t know where begin !
     
  4. pauleyman

    pauleyman DSM Wiseman

    4,657
    766
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Cable is likely. Stab the throttle and sidestep your foot off so it snaps shut. If it idles down the cable is very very suspect
     
    My DSM:
    1997 Eagle Talon TSi AWD

    Street Build

    T25   manual
    Loading...
  5. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,004
    927
    Joined Nov 14, 2013
    Independence, Kansas
    Do a BLT and see if you have bigger boost or vacuum leaks would be a good place to start. :)
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
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  6. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    I have already make a BTL wan nothing happened except the Oring of the BISS
    I suspect the TPS or the IAC to be bad
    I will test them tomorow :)
     
  7. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    And I don’t thing that there is a Leak somewhere, because the engine should always be at 3000rpm, but it’s not everytime, it’s always when the engine is warm and when I go for a ride, never when a start the car in my garage at cold
     
  8. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,004
    927
    Joined Nov 14, 2013
    Independence, Kansas
    That's really high rpm. No vacuum leaks or throttle cable to tight?
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
    Loading...
  9. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,004
    927
    Joined Nov 14, 2013
    Independence, Kansas
    Loosen the throttle cable mount just a bit and report back. :)
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
    Loading...
    Heryst78 likes this.
  10. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    Yes its really high, imagine when I’m driving and I have to stop at a redlight... my engine up to 3000rpm alone...
    maybe the cable, I will look at it, but I don’t understand why it can be a problem
     
  11. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    Yes i will do that :)
    Thanks again :)
     
  12. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,004
    927
    Joined Nov 14, 2013
    Independence, Kansas
    Just bein helpful. Might be something you just over looked! :thumb:
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
    Loading...
  13. Vegas smith

    Vegas smith Proven Member

    1,957
    855
    Joined Dec 2, 2002
    Houston, Texas
    Ha, Pauley that's a lot of slang for someone who doesn't speak English well. He's going to stab the throttle body with a knife now.
     
    My DSM:
    1993 Eagle Talon TSi AWD

    Street Build

    GT30   manual
    1992 Eagle Talon TSi AWD (sold)

    16g   manual
    Loading...
  14. pauleyman

    pauleyman DSM Wiseman

    4,657
    766
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    If cable sticks it's the same as if you'e pressing on the gas.
     
    My DSM:
    1997 Eagle Talon TSi AWD

    Street Build

    T25   manual
    Loading...
  15. tk106

    tk106 Proven Member

    584
    61
    Joined Sep 11, 2017
    Cincinnati, Ohio
    When the rpm sticks high, pull over and manually check the throttle body. Could also be that the throttle plate is sticking. Move it by hand on the opposite side of tps and see if that changes anything. When I replaced tb shaft seals, I didn’t install the plate correctly. It was slightly off.
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    16g   manual
    Loading...
  16. Murdertalon

    Murdertalon Proven Member

    214
    41
    Joined Jul 7, 2016
    East side, Washington
    I used an additional spring on my throttle body to snap it shut, tb likely needs rebuilt, but this is working fine for now.
     
    My DSM:
    1995 Eagle Talon TSi AWD

    Street Build

    15.9 @ MPH
    Loading...
  17. Heryst78

    Heryst78 Proven Member

    93
    2
    Joined Feb 9, 2017
    Paris, Europe
    Hey guys :)

    Thanks for your answer

    So !
    Yesterday, I decided to block off IAC and FIAV
    I delete them and I put a plate.
    I did a test drive and no more problem, now it’s ok :)

    Just, for the two water lines witch goes to the TB, how did you do for close them ?
    Personally, I just put a line from one to the second, is it ok?

    Thanks :)
     

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