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Friends GSX Eclipse issues

Posted by 49erGizmo, Jan 16, 2021

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  1. 49erGizmo

    49erGizmo Proven Member

    52
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    Joined Nov 3, 2017
    Cedar Park, Texas
    Friends message to me..., my gsx won't idle at all and when i want to drive it the car won't even go 20 mph in 1st gear . i had to see if it's the cam sensor but i don't know how to do that . idk if your available this today or tomorrow to check out . but whenever i wanna drive it i give it gas so it won't turn off but it barely wants to drive at all and if i i put the pedal down it doesn't wanna speed up

    Any one have heard of this issue or what it might be.
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  2. pauleyman

    pauleyman DSM Wiseman

    6,313
    1,597
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Boost leak
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
    Mello likes this.
  3. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    Thank ill let him know he has a boost leak
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  4. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    I check all his pipes from frontmount intercooler to intake manifold everything looked great..

    So I dont think its a boost leak..
    I noticed his throttle body wire to petal is loose not snug. Could this affect the car from staying on ?

    So like he was saying two things first car dont want to stay on. You have to hold gas down to stay on
    2nd if he forced the car to stay on a drive won't go pass 10 to 20 mph
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  5. steve

    steve DSM Wiseman

    13,641
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    Joined Feb 3, 2002
    Boulder, Colorado
    It's not designed to be snug, it's designed to be loose so that it doesn't hold the throttle open.
     

    329  4

    2008 Audi TT 3.2 Quattro Roadster
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    290  5

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

    324  2

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

    5K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  6. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    O ok so I guess I got to keep looking to see why his car just did this from one day to the next.
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  7. steve

    steve DSM Wiseman

    13,641
    759
    Joined Feb 3, 2002
    Boulder, Colorado
    You might also want to ask about things like what year car and if it's an auto or manual, if there is a CEL and which code, if the car seems like it running on all cylinders, and anything else that might help you and everyone else diagnose the problem.
     

    329  4

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

    290  5

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    324  2

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

    5K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  8. 49erGizmo

    49erGizmo Proven Member

    52
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    Joined Nov 3, 2017
    Cedar Park, Texas
    Friends car is a 1997 GSX eclipse manual.
    And it was running just fine till one day to the next...

    The only thing wrong with the car before this happend was the car would not go over 4,500 rpm

    But now he has this problem with not staying on .when foot is off the pedal.
     
    Last edited: Jan 18, 2021

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  9. pauleyman

    pauleyman DSM Wiseman

    6,313
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    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Looked great? Test it and know for sure. Visual inspection is not enough

    Why doesn't your friend just join here then he can have a profile etc. We can help him directly.
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  10. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    Not sure but all the My son's Friends rely on me to fix and figure out their cars LOL.
    For me, it keeps me busy and allows me to learn as much as I can.

    plus I have the same kind of car 1997 GSX eclipse.
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  11. pauleyman

    pauleyman DSM Wiseman

    6,313
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    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    If all of a sudden it wasn't running right then something happened. Need to quiz him why. He would do well to join here.
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  12. steve

    steve DSM Wiseman

    13,641
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    Joined Feb 3, 2002
    Boulder, Colorado
    Not to bust your chops but it sounds like it did have issues before it stopped idling. Was it misfiring or just no HP past that point?

    Assuming it's firing on all cylinders the idle speed is controlled largely by the throttle body (BISS screw and ISC/IAC) and ECU (MAF readings, and control over the ISC/IAC).

    My car won't run at all if the intake pipes pop off but I've heard of 2G's running, so Paul asking about it was a great question. The Idle Speed Controller (ISC/IAC) motors in the throttle body are know to fail and short out the ECU Drivers. That can cause the car to not idle but doesn't usually keep it from rev'ing to redline.

    Right now all we can do is guess along with you based on the information we have.
     

    329  4

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    awd · manual · Misc Vehicles

    290  5

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    324  2

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

    5K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
    Loading...
  13. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas


    I have been asking Him many question. I know when he got the car about 1 and half a go, it has been running but he just couldn't get the car to pass 4,500 RPM, it was taken to a shop in SA called Street Lab science and they couldn't figure it out all they said it could be his Cam sensor that is controlling his RPM issue but to me that didn't make sense. they did miss with the car but according to Miguel car came back worse.

    He bought this car with all these upgrades and modification but the car has never ran strong since he bought it...

    All He said was one day he takes the car to a car wash to get ready for a car meet to waking up in the morning to car not wanting to stay on.
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  14. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    DSMers,
    Here is the List of stuff that has been done to this GSX that we are trying to get back on the road.

    6 Bolt Swap 2 Liter 4g63 w/ Ross pistons / Scat rods

    GSC S3 280 cams

    Kiggley beehive springs

    New valve stem seals

    Fidanza cam gears

    AEM Series 2 engine management

    Defi Boost, Oil Pressure, EGT gauges

    Innovate LC1 wideband/gauge

    Magnus V3 intake manifold

    Shaved Q45 throttle body (FIAV removed)

    ETS 5'' intercooler 3'' inlet 3'' outlet

    Garrett 57 trim T3 turbo

    Turbonetics T3 manifold

    Tial 38mm wastegate

    Tial Q BOV

    Walbro 255 fuel pump

    1000cc injectors

    Shaved valve cover w/ 8an fittings welded on

    Calan catch can

    Aeromotive FPR and fuel rail

    JMFab coil pack relocation

    Greddy Profec B boost controller Spec 1

    Fluidampr pulley

    Tucked Afco VW Scirocco radiator w/16an braided radiator hose

    ACT 2600 clutch

    B&M short shifter

    Symborski shift kit

    Braided clutch line

    Removed clutch dampner

    Removed a/c. Heat still works

    Relocated battery to hatch area

    Saturn alternator upgrade.

    Stripped wire harness w/ deutsch connector near firewall. Fusebox moved to glovebox.

    Evo 8 Brembo front and rear brake swap

    3g Eclipse brake booster

    Stainless brakes lines

    Tein SS Coilovers w/ pillowball uppermounts

    SSR SP3 18X8.5 +37 wheels

    Nitto NT555 tires 235/40/18,

    Sparco Lap 5 steering wheel

    Shaved side markers and fog lights on front bumper. Bumper primed

    Carbon fiber hood with Aerocatch pins

    Stainless brakes lines
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  15. Mello

    Mello Proven Member

    1,240
    394
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    Nice laundry list. I have a question & a comment. Question - why a Profec boost contoller when running an AEM EMS? Comment - has a actual boost leak test been done? I did not see it mentioned that the leak test was actually done to find any leaks.
     
  16. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas

    Learning as I go but No I have not tested the boost leak with any tooling .I just check all the piping connection and everything looked good.I saw an old post how to make a boost leak tester. But haven't had time just yet.

    As for why would it have Profec Boost controller while running an AEM EMS.

    I dont know should it not have both?
    Like I said learning as I go with this Eclipse
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  17. Mello

    Mello Proven Member

    1,240
    394
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    No right or wrong just personal preference, hence my question. The AEM can also do boost control & do it well. You wouldn't need the Profec if you used the EMS for doing boost control.
     
  18. Jk's97DSM

    Jk's97DSM Proven Member

    218
    48
    Joined Apr 27, 2006
    Norfolk, Virginia
    I would send it to a shop that has dealt with the DSM/Evo platform before this becomes a part out thread.
     

    244  1

    1990 Mitsubishi Mirage EXE (SLO CSM)
    manual · Misc Vehicles

    Street Build 572  1

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  19. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas
    I agree this kid already spent 13k for a none running GSX
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  20. steve

    steve DSM Wiseman

    13,641
    759
    Joined Feb 3, 2002
    Boulder, Colorado
    Thank you for the list, we would have never guessed. None of the suggestions that assumed a stock car really apply. I'd start by learning how to log using the EMS and see how the EMS is configured. If it's running speed density boost leaks get lower on the diagnostic checklist.
     

    329  4

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

    290  5

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

    324  2

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

    5K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
    Loading...
  21. Jk's97DSM

    Jk's97DSM Proven Member

    218
    48
    Joined Apr 27, 2006
    Norfolk, Virginia
    I’ve dealt with shitshow cars. If it has AEM it shouldn’t have a old school Profec B. The wiring is probably pretty crazy, it might not even have a tune, and you’re most likely chasing a bunch of issues. You need to get into the computer and look at the tune. There you can check for normal sensor readings. Do a boost leak test. Check compression and timing. Do it all.
     

    244  1

    1990 Mitsubishi Mirage EXE (SLO CSM)
    manual · Misc Vehicles

    Street Build 572  1

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
    Loading...
    TK's9d2TSi and steve like this.
  22. 49erGizmo

    49erGizmo Proven Member

    52
    6
    Joined Nov 3, 2017
    Cedar Park, Texas

    I informed Miguel about the AEM and Profec B. hopefully this weekend I get free time to help figure out more about this car.
     

    Street Build 206  3

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  23. Jk's97DSM

    Jk's97DSM Proven Member

    218
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    Joined Apr 27, 2006
    Norfolk, Virginia
    Post some pics of the harness, connectors and fuse block relocation.
     

    244  1

    1990 Mitsubishi Mirage EXE (SLO CSM)
    manual · Misc Vehicles

    Street Build 572  1

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
    Loading...

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