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2G No boost 1st/2nd Gear

Posted by DSM_15_2G, Nov 26, 2019

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  1. DSM_15_2G

    DSM_15_2G Proven Member

    32
    13
    Joined Dec 6, 2018
    Serbia, Europe
    I've searched but haven't found many other threads with the similar issues, if there are any I apologize

    As the title states, I don't feel any boost in 1st and 2nd gear.

    Since my car was a 4g63NA 2G 99 year (Euro spec), after I boosted it with GST parts (you have my build list in profile), the car ran like crazy, in 1st gear it would rip, 2nd gear crazy power all the way to 5th.

    So lets say how turbo works, get the rpms to 3k and you start to hear the turbo spooling and with the engine power there then + boost starts pulling you forward in any gear. Now I can't feel that in any gear anymore LOL

    I can hear the turbo spool in 3rd gear but there isn't much of a pulling feeling anymore like before and in 1st and 2nd gear can't even hear it nor feel it. + I can hear the bov release air when I let go (I have Injen intake pipe and open air filter) with 2.8 from turbo to the back custom exhaust

    I do have a boost gauge but the issue is, it was connected wrong and it reads 25psi all the time so I can't see

    I checked the turbo for play and its solid as it was when I installed it (it was rebuilt).

    Maybe boost leak ; wastegauge actuator ; exhaust leak can cause this?

    I also have ECM Link V3 just to mention
     

    Street Build 265  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  2. lglracer

    lglracer Supporting VIP

    101
    24
    Joined Jul 13, 2008
    Sacramento, California
    Have you done a compression test? Could have some bad rings.
     

    Road Race Build 497  1

    1991 Mitsubishi Eclipse GSX
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  3. DSM_15_2G

    DSM_15_2G Proven Member

    32
    13
    Joined Dec 6, 2018
    Serbia, Europe

    Yes, no issues there. I am not talking about engine lack of power but there's no added turbo boosted power anymore. I did the turbo swap recently (this summer) with a little pedal push it will spool and pull with added power, now in 2nd gear rips when I do a pull (I never WOT) but I can't feel that turbo pull anymore, it use to spin tires in 2nd gear at 4k rpm I think
     

    Street Build 265  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  4. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,754
    2,144
    Joined Nov 14, 2013
    Independence, Kansas
    Fix the boost gauge then do a boost leak test. Check the WG for good tension and report back. We're here to help.
    A log during it would help a bunch.
     

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  5. Waco4g63

    Waco4g63 Probationary Member

    13
    3
    Joined Aug 14, 2018
    Philipsburg, Montana
    Possible major boot leak. Do you have a boost leak tester? You can make one for a couple bucks and definitely fix the boost gauge.
     

    Street Build 323  2

    1999 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  6. DSM_15_2G

    DSM_15_2G Proven Member

    32
    13
    Joined Dec 6, 2018
    Serbia, Europe
    Working on getting the boost gauge fixed, what about spark plugs? I have a new set which I gapped myself (BPR6ES to 0.32 or 0.30 can't remember on top of the head).
    I do have this log, I know it has knock, prolly because its still an NA engine with higher compression, running 100 octane gas over here. Since then, had some timing pulled in those areas where knock occured. Before when the turbo would spool and pull, the turbo pull would feel smooth as if something is pulling me, now it almost feels like its struggling and I can feel a bit of vibration (the more I press the gas pedal the more it vibrates)


    I know boost leak can cause this, tested boost leak 2 months ago but I never reached to the intercooler area to see, should check it out anyway
     

    Attached Files:

    Street Build 265  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  7. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,754
    2,144
    Joined Nov 14, 2013
    Independence, Kansas
    Appropriate fuel pressure is also something to check as boost comes in so its not starving for fuel. Is the boost source hooked up to your AFPR? Just had to ask the obvious.
     

    Street Build 4K  27

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

    662  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    497  18

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

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    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
    Loading...
  8. DSM_15_2G

    DSM_15_2G Proven Member

    32
    13
    Joined Dec 6, 2018
    Serbia, Europe
    Boost source as in boost gauge? Im still running a stock GST FPR , if you meant on the boost gauge, it is set up correctly but since its pro sport electrical gauge it has a sender thingie which needs to be connected to the gauge. Thats the part that got installed wrong (it isn't wired together so the gauge doesent get the right signal)
     

    Street Build 265  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  9. motomattx

    motomattx Proven Member

    2,027
    729
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Knock counts will kill your power.
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  10. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,754
    2,144
    Joined Nov 14, 2013
    Independence, Kansas
    Is the vacuum line still hooked up to the regulator is what I meant.
     

    Street Build 4K  27

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

    662  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    497  18

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 701  7

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
    Loading...
  11. DSM_15_2G

    DSM_15_2G Proven Member

    32
    13
    Joined Dec 6, 2018
    Serbia, Europe
    Oh, yes of course. I zip tied it for just in case so it holds much better
     

    Street Build 265  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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