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Engine Bogs

Posted by PIGNOSE, Jun 25, 2018

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  1. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    Hello
    My stock 2G GST does not pull hard after 4500rpm in all the gears, the engine feels like its running without any boost after this rpm
    but... the problem doesn't appear while the car is in neutral at WOT

    I've recently replaced:
    -spark plugs cables
    -spark plugs
    -knock sensor
    -gasoline filter

    the car is running at 10psi
    i've checked for boost leaks and cleaned the injectors


    thank you for reading

    77905B90-1A51-435F-850E-DA8ADE835936_zpsesnpmuwr.jpg
     

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    Last edited: Jun 25, 2018
  2. Vegas smith

    Vegas smith Proven Member

    1,988
    877
    Joined Dec 2, 2002
    Houston, Texas
    Do a compression test on the engine. Any check engine lights?
     
    My DSM:
    1993 Eagle Talon TSi AWD

    Street Build

    GT30   manual
    1992 Eagle Talon TSi AWD (sold)

    16g   manual
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    PIGNOSE likes this.
  3. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    i did a compression test when i bought the car, the results were 120psi all across
    yes the check light engine is on
    went to autozone and pulled out one code p0130

    you think the oxygen sensor is the cause?
     
  4. Mello

    Mello Proven Member

    656
    106
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    Yes I think an O2 sensor could cause this problem.
     
  5. Vegas smith

    Vegas smith Proven Member

    1,988
    877
    Joined Dec 2, 2002
    Houston, Texas
    I agree^^
     
    My DSM:
    1993 Eagle Talon TSi AWD

    Street Build

    GT30   manual
    1992 Eagle Talon TSi AWD (sold)

    16g   manual
    Loading...
  6. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    i just replaced the oxygen sensor and erased the code

    the problem still there

    any other ideas???

    btw im getting great gas milage now..
     
  7. Mello

    Mello Proven Member

    656
    106
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    You said you replaced the spark plugs. What Brand plugs did you put in?
     
  8. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    replaced them with NGK BPR6ES gapped at .030
     
    Last edited: Jun 27, 2018
  9. 802gst

    802gst Proven Member

    47
    26
    Joined Feb 12, 2017
    St.albans, Vermont
    try dropping that gap down to .26-.28, might not be the issue but this has happened to my gst before she doesn't like .30
     
    My DSM:
    1998 Eagle Talon TSi AWD

    Street Build

    16g   manual
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  10. adrian2627

    adrian2627 Proven Member

    119
    4
    Joined Jul 13, 2005
    Hattiesburg, Mississippi
    BLT done?
     
    My DSM:
    Loading...
  11. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,051
    951
    Joined Nov 14, 2013
    Independence, Kansas
    Factory is .028.
    I run mine much tighter but under much more boost.
     
    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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  12. chrysler kid

    chrysler kid Proven Member

    1,480
    351
    Joined Dec 20, 2002
    Mckinney, Texas
    The T25 sucks but it shouldn't fall at 4500, more like 5500

    The T25 minimum boost off the wastegate actuator is 12psi. So you have a boost leak or the wastegate actuator is messed up
     
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  13. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    done
    thanks bro



    yes sir, two times just to make sure


    boost doesn't creep or drop at 4500rpm or after
     
  14. adrian2627

    adrian2627 Proven Member

    119
    4
    Joined Jul 13, 2005
    Hattiesburg, Mississippi
    How's the basic maintenance? is base timing set? any CEL flashing from 4500 on? fuel pump still good? FPR still good? fuel filter good?
     
    My DSM:
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  15. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    As far a basic maintenance all filters, liquids and plugs have been replaced. Checked the base timing and all marks line up.

    I also checked the FPR with a vacuum gun and hooked up a fuel pressure gauge to the fuel line, everything looks in range on idle and under boost (boost is set a 10psi)

    I don't now what CEL flashing is...

    the problem persist
     
  16. adrian2627

    adrian2627 Proven Member

    119
    4
    Joined Jul 13, 2005
    Hattiesburg, Mississippi
    stupid question but...do you thing the clutch is slipping after 4500?
     
    My DSM:
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  17. PIGNOSE

    PIGNOSE Probationary Member

    11
    0
    Joined Apr 22, 2018
    Queretaro, Central America
    mmm i believe the clutch is in good

    The car has torque steer while shifting through the gears from 1st to 2nd gear
     
  18. adrian2627

    adrian2627 Proven Member

    119
    4
    Joined Jul 13, 2005
    Hattiesburg, Mississippi
    Do you have any way to log your ecu? kinda hard to play guessing game without some sort of data in front of us.
     
    My DSM:
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  19. rEclipserGST

    rEclipserGST Proven Member

    1,362
    11
    Joined Nov 17, 2007
    G-City, Ohio
    What did you do the BLT to?
     
    My DSM:
    1995 Eagle Talon TSi AWD

    13.583 @ 108.440 MPH
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