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Turbo problems?

Posted by haybale8, Jul 6, 2015

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  1. haybale8

    haybale8 Probationary Member

    14
    0
    Joined Jan 30, 2015
    Omaha, Nebraska
    So while driving my 95 TSi talon, it randomly shut off. Then when I try to restart it, it only starts for a few seconds then shuts back off. I was thinking it was the turbo, so I took it out and it isn't frozen.
    Does anyone know if it could still be the turbo or know what else could be wrong?
     

    Street Build 636  0

    1995 Eagle Talon TSi AWD
    manual · 2G DSM
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  2. Dsmkauai

    Dsmkauai Proven Member

    3,928
    414
    Joined Feb 20, 2010
    Kauai, Hawaii
    Did you do a boost leak test? Check over wires and connections? Does turbo have shaft play?
     

    Drag Race Build 840  2

    1995 Eagle Talon TSi
    fwd · automatic · 2G DSM

    6K  0

    1991 Mitsubishi Galant VR-4
    13.7 @ 101 · Galant VR-4

    4K  0

    1995 Mitsubishi Eclipse GST
    12.408 @ 112.930 · 2G DSM

    2K  0

    1998 Eagle Talon TSi
    manual · 2G DSM
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  3. Schmegma

    Schmegma Proven Member

    31
    0
    Joined Nov 23, 2008
    arvada, Colorado
    does it have any problems idling? Check the relays, fuses first. Then I would check the alternator - pretty common failure. Wiring - make sure everything is good, tight - no corrosion anywhere. After that if the alt and connections / wiring are all good - check the fuel pump.

    Hope this info helps. Good luck!

    Also what mods do you have, stock radio? Could be something simple like a loose connection.
     
  4. John Myers

    John Myers Proven Member

    35
    5
    Joined Sep 17, 2014
    Wahoo, Nebraska
    Well u didnt really need to take the turbo off to conclude it was siezed. But the good news is if you went through all of that, the next troubleshooting steps should be fairly easy haha.

    If it starts and dies, I would first suspect low fuel pressure. But low fuel pressure can be caused by sensor values being off telling the ECU to not add the fuel, not only the mechanical parts of the fuel system. If you hold the gas down, does it stay running longer? Do you have a way to measure fuel pressure?

    Another good place to start is by running the codes. That should indicate if one of the sensor values are off, then you can go through the troubleshooting steps on that circuit. Also visually inspect your belts to make sure they are all in good shape as well.

    I'm not a guru, but I am in the area btw if you want help.
     

    Street Build 977  0

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  5. haybale8

    haybale8 Probationary Member

    14
    0
    Joined Jan 30, 2015
    Omaha, Nebraska
    Well we put a new computer in it a few months ago and just started driving it again since. We never really "adjusted" it so now i'm wondering if that might have something to do with it.
    Thanks though, I'll keep that in mind ha.
     

    Street Build 636  0

    1995 Eagle Talon TSi AWD
    manual · 2G DSM
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  6. steve

    steve DSM Wiseman

    12,858
    633
    Joined Feb 3, 2002
    Boulder, Colorado
    Not sure what you are thinking about. The fuel pressure on a DSM is mechanically controlled by the fuel pressure regulator modulated by the intake manifold pressure/vacuum (base + manifold). There isn't any ECU involvement besides turning the fuel pump on.

    The amount of fuel injected is under ECU control but the ECU expects that the fuel pressure is being maintained by the regulator so that the injectors always spray the same amount of fuel for a given unit of time.
     

    12  2

    2008 Audi TT 3.2 Quattro Roadster
    awd · manual · Misc Vehicles

    12  4

    2002 Audi TT Quattro Roadster 225
    awd · manual · Misc Vehicles

    30  2

    1992 Dodge Stealth RT/TT
    awd · manual · 3000GT/Stealth

    4K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
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    John Myers likes this.
  7. John Myers

    John Myers Proven Member

    35
    5
    Joined Sep 17, 2014
    Wahoo, Nebraska
    I thought if for instance your coolant temp sensor tells the ecu the engine is overheating, the ecu would pull fuel?
     

    Street Build 977  0

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  8. steve

    steve DSM Wiseman

    12,858
    633
    Joined Feb 3, 2002
    Boulder, Colorado
    Not sure it does that, but if it did, it would be by reducing the injector pulse width not by changing the fuel pressure.
     

    12  2

    2008 Audi TT 3.2 Quattro Roadster
    awd · manual · Misc Vehicles

    12  4

    2002 Audi TT Quattro Roadster 225
    awd · manual · Misc Vehicles

    30  2

    1992 Dodge Stealth RT/TT
    awd · manual · 3000GT/Stealth

    4K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
    Loading...
  9. 2fast2evo

    2fast2evo Proven Member

    82
    15
    Joined May 17, 2015
    Kingston, ON, Canada
    Does it only do this when the car is warmed up? Does it just shut off entirely, if so what kind of RPM/load?
     

    2K  0

    1994
    manual · Lancer Evolution
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  10. haybale8

    haybale8 Probationary Member

    14
    0
    Joined Jan 30, 2015
    Omaha, Nebraska
    One day I was driving it and it shut off, and would only turn on for a few seconds at a time, so i had to rent a uhaul tower to get it home.
     

    Street Build 636  0

    1995 Eagle Talon TSi AWD
    manual · 2G DSM
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  11. 2fast2evo

    2fast2evo Proven Member

    82
    15
    Joined May 17, 2015
    Kingston, ON, Canada
    Do the standard checks. Air leaks (boost or vacuum) as a precaution, but totally random dying (as it sounds?) without any other sorts of behaviour from the car (stuttering? RPM surging? Bogging? Sounds/flashing lights?) sounds to me like some sort of electrical short. Heck, even just make sure that your battery connectors aren't corroded. In my experience, electrical problems tend to be more sporadic and instant, while mechanical ones (leaks e.g.) tend to be more constant and gradual.
     

    2K  0

    1994
    manual · Lancer Evolution
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  12. enriquez2000

    enriquez2000 Proven Member

    1,438
    123
    Joined Oct 5, 2014
    fort collins, Colorado
    It does do that. Just delt with mine having a crack in a wire and not starting very well. But you are right it controls injector pulse to add fuel when cold
     

    Street Build 2K  12

    1993 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  13. DBroadard

    DBroadard Probationary Member

    4
    1
    Joined Oct 5, 2013
    New Castle, Delaware
    I wouldn't attribute the car dying to the turbo, so don't stress about that, which can be costly. Think more along the lines of a fuel pump, electrical wiring.. anything fuel related.
     
    2fast2evo likes this.

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