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1G Bad idle after I put throttle body gaskets on wrong

Posted by mitsuowner1991, Oct 12, 2019

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  1. mitsuowner1991

    mitsuowner1991 Proven Member

    154
    3
    Joined Sep 29, 2009
    West Keansburg, New Jersey
    Car was running ok.. went and changed the thottle bodie gaskets and by accident i put the one on the wrong way and i started the car the idle srarted surging. So i looked under hood heard the hissing from the TB gasket i put on wrong.. so i corrected the gasket and no more leak but i still have the surging idle.. Can you mess anything else up if to much air gets in there? Im starting to think it somehow messed the TPS up.
     

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    2005/HONDA/CBR600RR
    rwd · manual · Misc Vehicles

    35  1

    03 Volkswagen Jetta 1.8t
    fwd · manual · Misc Vehicles

    Street Build 270  5

    1991 Mitsubishi Eclipse GSX
    16.396 @ 83.38 · 1G DSM

    211  0

    1991 Mitsubishi Eclipse GSX
    · 1G DSM
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  2. pauleyman

    pauleyman DSM Wiseman

    5,138
    1,001
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    No. But you probably inadvertently fixed a leak and now your idle needs readjustment. So do that.
     

    Street Build 3K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  3. Lucky13

    Lucky13 Supporting Member

    98
    9
    Joined Nov 20, 2002
    Palm Beach Gard, Florida
    Do you have DSMLink or similar to check the TPS voltage at idle?
     
  4. mitsuowner1991

    mitsuowner1991 Proven Member

    154
    3
    Joined Sep 29, 2009
    West Keansburg, New Jersey
    My super afc does. And i made a little setup to check it i have the tps to .49 at idle
     

    65  1

    2005/HONDA/CBR600RR
    rwd · manual · Misc Vehicles

    35  1

    03 Volkswagen Jetta 1.8t
    fwd · manual · Misc Vehicles

    Street Build 270  5

    1991 Mitsubishi Eclipse GSX
    16.396 @ 83.38 · 1G DSM

    211  0

    1991 Mitsubishi Eclipse GSX
    · 1G DSM
    Loading...
  5. Lucky13

    Lucky13 Supporting Member

    98
    9
    Joined Nov 20, 2002
    Palm Beach Gard, Florida
    The car wants to see .63 at idle so I'd start there. Fixing the seals is also probably going to affect your BISS screw adjustment.
     
  6. Cherry

    Cherry Proven Member

    190
    47
    Joined Jun 16, 2019
    Hull, Georgia
    The factory manual says .48-.52v. ECMlink wants it at .63v.

    There are many places air could be leaking though I would at least try to adjust the BISS first. With how old these cars are seals start to get hard and could start to leak. Injector insulators, BISS o-ring, vacuum lines, gaskets, shaft seals, ISC o-ring, FIAV housing o-ring. If adjusting the BISS doesnt work start checking for cracks or hard seals.
     

    Street Build 255  3

    1991 Mitsubishi Eclipse N/T
    fwd · manual · 1G DSM
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