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GVR-4 VR4 engine sputtering

Posted by dsmania17, Jul 21, 2019

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  1. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    I start the car and it sputters like a misfire so I have checked everything and all looks good, so I disconnect the battery for a few minutes plug it back in and the car runs normal like nothing is wrong when I get to where am going and started up again sputtering misfire again I have to unplug the battery to get it running correct again. Does anyone know why this could be happening.
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  2. ThunderChild

    ThunderChild Supporting VIP

    2,516
    682
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Check plugs to see if one is fouling, and also check for consistent spark, may have a coil going bad, or a ptu.
     

    Street Build 164  3

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

    257  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 790  7

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

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  3. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    plugs are nice and tan just changed the coil pack just in case and still sputtering frustrating
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  4. steve

    steve DSM Wiseman

    12,726
    515
    Joined Feb 3, 2002
    St. Charles, Illinois
    Has your ECU been replaced or serviced? If it's original it needs to be checked for capacitor leakage.
     

    3K  0

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  5. GST with PSI

    GST with PSI DSM Wiseman

    1,781
    1,248
    Joined Jul 27, 2005
    San Diego, California
    What tuning solution are you using? Is your mod list accurate?
     

    Street Build 23K  17  143

    1991 Mitsubishi Galant VR-4
    12.030 @ 119.39 · Galant VR-4

    229  17

    1982 Yamaha Virago
    rwd · manual · Misc Vehicles

    Street Build 5K  74

    1992 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  6. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    yes list of mods is current, i opened the ecu and everything looks clean, when i get home today am going to swap airflow meter and see if ti fixes it also the tcu am going to change it and see what it does it helps when i have perfectly running gst that i can interchange parts from.
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  7. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    i also did a compression test and is 160 across the board
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  8. DarkKnight86

    DarkKnight86 Probationary Member

    8
    3
    Joined Sep 25, 2016
    Mansfield, Texas
    Cas or igniter good? It wouldn't hurt to try to another maf sensor.
     
  9. curt-s

    curt-s Proven Member

    740
    202
    Joined Dec 21, 2008
    Winterville, MB, Canada
    Is it still running well right before you shut it off? Only when you start it later does it act up?
    I was thinking perhaps, by disconnecting the battery, learned values like trims are reset and that's why it runs fine after.. like when an o2 sensor starts going out and throws closed loop fuel off the mark. But if it runs great before shutting it off, that's potentially a different story.
     

    Street Build 2K  1

    1991 Eagle Talon TSi
    fwd · manual · 1G DSM
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    tk106 likes this.
  10. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    changed the airflow meter and that did it thanks for all the help
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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    DarkKnight86 and steve like this.
  11. dsmania17

    dsmania17 Probationary Member

    14
    2
    Joined Jan 17, 2017
    sunrise, Florida
    Hello to all so this morning on my way to work am at a light and smoke starts coming out of the hood i pulled over open the hood and is the freon being released, not sure why this happened when i get home tonight am going to check the fan unit and also i hope the car doesn't over heat with just one fan in traffic. Any thoughts what could have done this.
     

    222  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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