misfire issue

Discussion in 'Mazdaspeed 3 Troubleshooting' started by ToXic3, May 18, 2016.

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  1. ToXic3

    ToXic3 Greenie Member

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    So here's my story.. Saturday went to Dyno Day at a local shop. Put car on Dyno and it wasn't reading my car, (this was my first dyno experience so I thought they went into obd port) he tapped into Cylinder 1 at the coil pack. So I then take the car off dyno and that's when the fun started. I popped a cylinder 1 misfire code so I swapped it with cylinder 4 coil and popped cylinder 4 code. Bad coil right? well this morning I got new coil from Mazda dealer and still misfire and the misfire still following the coil pack. Has anybody ever had this issue before? Im thinking its a wiring issue but the misfire follows the new coil pack and wires and connections look good??? CHIT
     
  2. Raider

    Raider Administraider Administrator Platinum Member

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    So even swapping the new coil pack around, does the issue carry over? the fact it moved leads the whole "check the gap" out of the equation.

    There is the stretch the coil wire trick too, its posted online, maybe on the old forum, on how to do that.

    Oh, and most importantly, what was the hp/tq on the dyno, lol.
     
  3. ToXic3

    ToXic3 Greenie Member

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    yes, I put new coil on 1 misfire cyl.1, put coil on 4 misfire cyl.4. I didn't get to do anything on they dyno because they couldn't get a reading from my car. They hooked the car up told me to start it, once car started dyno guy said "its not reading your tach" . I don't know wtf happened? Could a dyno f up my car? it ran perfect on the way there I took 2 logs and sent to Tuna and he even said shit was good!
     
  4. Raider

    Raider Administraider Administrator Platinum Member

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    Either new is defective or maybe the springs need stretched. pop the pack apart, pull out the spring. Based on the how to, stretch apart the smaller sections of springs between 1/4 and 1/2'', and reinstall.
     
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  5. ToXic3

    ToXic3 Greenie Member

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    I will try the stretch "mod".
     
  6. Raider

    Raider Administraider Administrator Platinum Member

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    If it continues, @Rokusek and I think it could be a bad new coil.
     
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  7. Rokusek

    Rokusek Are you my dad? Motorhead Platinum Member

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    Absolutely bad coil from dealer. rare, but it has been known to happen.
     
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  8. ToXic3

    ToXic3 Greenie Member

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    Ok, my friend has a speed 3 and im going to swap my new coil with his car to see if coil works. I have to wait till Friday now for new one from Mazda. Bummer
    [doublepost=1463594460][/doublepost]I talked with Mazda tech and he spoke of PCM.. well fuck me running backwards!!!! Although this is the same tech that told me I had fp internals hitting 1700-1800psi max so.
    [doublepost=1463623125][/doublepost]coil packs worked in my friend Speed 3 so I went home and did a little tinkering and narrowed it down to cylinders 1 & 4 I swapped all the coil packs around 12234 and the misfire is only happening with one and four I switch them around and it jumps back and forth from 1 to 4 what the hell man
     
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  9. ToXic3

    ToXic3 Greenie Member

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    Coils work fine on my buddies speed, I got abother problem eeekk
     
    ToXic3, via a Samsung mobile device, May 19, 2016
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  10. Raider

    Raider Administraider Administrator Platinum Member

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    now that is fucking weird man.
     
  11. ToXic3

    ToXic3 Greenie Member

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    well I got it running right and no more misfire.. My last thought (should have done it first) was to check the plugs and sure as shit cylinder #1 was loose and needed to be re-gapped. Ok I understand that, but why was the misfire following the coil on 1 and 4???? it was literally 1 plug and I assumed the whole time it was the coil.
     
  12. Raider

    Raider Administraider Administrator Platinum Member

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    That is indeed bizarre. There was no real reason for plugs as a cause since the issue followed.
    Chalk it up to a P666 error. Car controlled by Satan
     
    Raider, via an iPhone, May 19, 2016
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  13. ToXic3

    ToXic3 Greenie Member

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    Exactly
    [doublepost=1463707308][/doublepost]I don't think my car like NGK's I might switch back to Denso. This is 2nd issue I have had with the NGK.
    [doublepost=1463707604][/doublepost]Got some free coils out of it though.
     

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    ToXic3, via a Samsung mobile device, May 19, 2016
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  14. Raider

    Raider Administraider Administrator Platinum Member

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    Denso has a bad history of spitting electrodes onto the pistons and opening up the gap like a hooker's legs on Saturday night. Keep an eye on em.
     
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  15. Rokusek

    Rokusek Are you my dad? Motorhead Platinum Member

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    Well I'll be damned. Plug definitely would have been my next guess. Did you by chance check the gap on them all?
     
    Rokusek, via a mobile device, May 20, 2016
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  16. Raider

    Raider Administraider Administrator Platinum Member

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    I do not get how it followed, if it was the plug. That was a static variable. Unless when moved, the other coil was not touching the plug enough, and the cyl 1 plug did. Just weird.
     
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  17. James b 87

    James b 87 Greenie N00B Member

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    My wife's cx-7 is doing the samething. Did injectors because of slow acceleration. Did plugs cause I was that deep so why not. Get it back together and it was missing on cyl3 swap coils and plugs with cylinder 4 and it moves to that cylinder. So I'm like bad coil. Get a new one and put it in and still missing on cylinder 4. So I swap the coil with cylinder 3 and it's still missing on cylinder 4. So I swap plugs and it moves to cylinder 3. So I get another new plug and put it in and now the miss is on cylinder 4. Wtf
     
    James b 87, via a mobile device, Aug 28, 2016
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  18. Raider

    Raider Administraider Administrator Platinum Member

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    Might be a coil wire issue. Stretch the spring in the coil wire.
     
    Raider, via an iPhone, Aug 28, 2016
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  19. James b 87

    James b 87 Greenie N00B Member

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    How do you do this?
     
    James b 87, via a mobile device, Aug 29, 2016
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  20. Raider

    Raider Administraider Administrator Platinum Member

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    Saw this on another forum.

    Pull the coil pack apart and stretch the wire in the middle.

    [​IMG]
     
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