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2G Weird sound coming from under intake manifold

Posted by Ivan Garcia, Apr 3, 2019

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  1. Ivan Garcia

    Ivan Garcia Probationary Member

    16
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    Joined Apr 3, 2019
    King City, California
    Hi y’all! First time poster. I have a 97’ GST making a WAP WAP sound under the intake manifold when only in drive. Sometimes goes away with RPM. No power is lost just sounds pretty bad. Any idea what it could be?
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  2. Vegas smith

    Vegas smith Proven Member

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    No idea what wap equates to in sound. How can you tell it's coming from under the manifold when you drive?
     

    Street Build 4K  10

    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  3. Ivan Garcia

    Ivan Garcia Probationary Member

    16
    1
    Joined Apr 3, 2019
    King City, California
    We had it up on jack stands. It doesn’t really sound like metal hitting metal.
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  4. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    WAP WAP WAP WAP WAP = launch control to me. :D Put up a video.
     

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  5. Ivan Garcia

    Ivan Garcia Probationary Member

    16
    1
    Joined Apr 3, 2019
    King City, California
    I’ll try to put one up as soon as possible
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  6. ThunderChild

    ThunderChild Supporting VIP

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    Sounds like something might be wrapped around the CV axle
     

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  7. Ivan Garcia

    Ivan Garcia Probationary Member

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    Joined Apr 3, 2019
    King City, California
    It happens when I’m parked in drive also, I’m leaning towards something transmission wise.
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  8. ThunderChild

    ThunderChild Supporting VIP

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    Does it increase with engine speed?
    It does seem like it will be trans related by your description, just cant think of anything that would produce a "wap wap wap" sound.
     

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  9. Ivan Garcia

    Ivan Garcia Probationary Member

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    King City, California
    It’s not very constant either, sometimes it happens
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  10. ThunderChild

    ThunderChild Supporting VIP

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    Almost makes me think clutch or TOB related.
     

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  11. Ivan Garcia

    Ivan Garcia Probationary Member

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    King City, California
    The vid I took says it’s too long
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  12. Ivan Garcia

    Ivan Garcia Probationary Member

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    Joined Apr 3, 2019
    King City, California

    There we go
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  13. ThunderChild

    ThunderChild Supporting VIP

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    You're missing a tq converter bolt, im thinking you have others that are loose and hitting stuff. Either that or the flexplate is broken/cracked. Gonna need a bore scope to see, remove the transmission is pretty much a necessity to be sure.

    Your trans also seems to be flexing away from the block when you put it in drive (as well as the engine moving ALOT) which makes me think you've got loose or missing Bell housing bolts.

    Check the Bell housing bolts, replace any that are missing, tighten any loose ones. Do the same to the torque converter/flexplate bolts, and you may want to look into replacing uour motor mounts with at least new oem style, if not prothane inserts.
     

    Street Build 614  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

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    1987 Toyota Pickup/Hilux
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    fwd · manual · 2G DSM

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  14. Ivan Garcia

    Ivan Garcia Probationary Member

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    Joined Apr 3, 2019
    King City, California
    I just ordered a new one after I saw LOL
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  15. 007jimmy

    007jimmy Proven Member

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    2B6EF28B-310C-4E65-9280-C692338D5024.jpeg Make sure to red Loctite all the converter bolts and check all of your motor mounts. Replace them as necessary. 3 of the mounts are attached to the transmission. I ended up going all solid mounts on my 97 AWD. It was clunking pretty bad after I purchased the car. Here is a picture of my trans mounts
     

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    1997 Mitsubishi Eclipse GSX
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  16. Ivan Garcia

    Ivan Garcia Probationary Member

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    Joined Apr 3, 2019
    King City, California
    For sure, we’ll change the motor mounts, good thing she isn’t a daily LOL
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  17. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Be sure to make a DSM Profile st some point on this site too.:D
     

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  18. Ivan Garcia

    Ivan Garcia Probationary Member

    16
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    Joined Apr 3, 2019
    King City, California
    Just made one! Lol
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  19. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Awesome!:thumb:
     

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  20. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    You probably know this but don't drive it until it's fixed.
     

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  21. Ivan Garcia

    Ivan Garcia Probationary Member

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    King City, California
    Yea, got the flex plate bolt coming in tomorrow. $17 for one bolt with shipping!
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  22. ThunderChild

    ThunderChild Supporting VIP

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    Might have been more cost effective to buy a whole set.

    Also, I edited my last post directly after you replied, but check all the bell housing bolts.

    The mounts will be a nice addition, tho they add some vibes to the car.
     

    Street Build 614  3

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  23. Ivan Garcia

    Ivan Garcia Probationary Member

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    Joined Apr 3, 2019
    King City, California
    Some vibes?
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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  24. ThunderChild

    ThunderChild Supporting VIP

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    Vibrations transmitted through the car, as they're stiffer, if you go with the prothane mounts. My 1g with prothanes is pretty shakey inside.
     

    Street Build 614  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    637  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 1K  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    2K  0

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 3K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  25. Ivan Garcia

    Ivan Garcia Probationary Member

    16
    1
    Joined Apr 3, 2019
    King City, California
    Ohhh I see
     

    Street Build 146  1

    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM
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