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Coil packs

Posted by Bluecifer361, Jul 31, 2020 at 7:01 PM

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  1. Bluecifer361

    Bluecifer361 Proven Member

    66
    9
    Joined May 31, 2020
    Corpus christi, Texas
    Well it looks like I’m getting no spark to a spark plug I have replaced the wires next is the coil packs the oem ones seem expensive so before I buy one is their a aftermarket one anyone suggest
     

    Street Build 193  4

    1998 Mitsubishi Eclipse GSX
    manual · 2G DSM
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  2. DSMPT

    DSMPT Proven Member

    898
    457
    Joined Jun 12, 2014
    Japan / Mexico, Arizona
    I would go with a good used OEM coil pack rather than a new cheap chinese coil pack. But are you sure that the issue is the coil pack? Not the PTU or ECU?
     

    Drag Race Build 2K  3

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    Street Build 2K  4

    1998 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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  3. Bluecifer361

    Bluecifer361 Proven Member

    66
    9
    Joined May 31, 2020
    Corpus christi, Texas
    I’m sure what the ptu is but I took each spark plug out and plugged them into the wires laid them out on a towel and had my wife crank the engine only one had no spark
     

    Street Build 193  4

    1998 Mitsubishi Eclipse GSX
    manual · 2G DSM
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  4. luv2rallye

    luv2rallye DSM Wiseman

    7,729
    650
    Joined Jun 7, 2003
    Minneapolis, Minnesota
    Did you ground the spark plug cases when testing?
    Note that with a waste spark system both spark plugs connected to each coil fire together.
    Try swapping the spark plug that doesn't fire to the other coil to see result.
    Is this a 4G63T or 420A?
     

    3K  0

    1999 Mitsubishi Eclipse GST
    14.200 @ 95.000 · 2G DSM
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  5. Bluecifer361

    Bluecifer361 Proven Member

    66
    9
    Joined May 31, 2020
    Corpus christi, Texas
    4g63t

    no I didn’t ground anything I just laid them on a towel do I need to ground them if so how would I go about that?
     

    Street Build 193  4

    1998 Mitsubishi Eclipse GSX
    manual · 2G DSM
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  6. luv2rallye

    luv2rallye DSM Wiseman

    7,729
    650
    Joined Jun 7, 2003
    Minneapolis, Minnesota
    Yes you MUST ground the spark plug casings. Clamp them against some engine metal that's unpainted. Or use battery jumper cables on each to ground. Note that both spark plugs on a coil are actually part of the same electrical circuit (one on each end of the secondary coil's winding) to ground.
     
    Last edited: Aug 2, 2020 at 12:54 PM

    3K  0

    1999 Mitsubishi Eclipse GST
    14.200 @ 95.000 · 2G DSM
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  7. Jk's97DSM

    Jk's97DSM Proven Member

    172
    34
    Joined Apr 27, 2006
    Norfolk, Virginia
    You need a spark tester. If it was a coil it would be 2 cylinders. The control module could cause that.
     

    165  1

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

    Street Build 485  1

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