Cylinder 3 misfire & Awful Sound After

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Benny71, Apr 2, 2021.

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  1. Benny71

    Benny71 Silver Member

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    The head is definitely usable. You would need to do a little machining to get rid of the pitting around the valves from the little pieces that were flying around in there. I have a long block that will be on the way shortly. Let me get back to you once I have everything squared away with the new motor.

    Funny how I was excited last week thinking that I was only 1500 miles away from 250k & mentioned to my GF how well the car was running. I guess the Mazda gods showed me LOL. I'm not totally shocked, shit happens. I've got a new long block on the way so happy Speed 3 driving isn't too far off.
     
    Last edited by a moderator: Apr 6, 2021
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  2. Duey1083

    Duey1083 Gold Member

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    Where are you getting your new long block from?
     
    Duey1083, via a Samsung mobile device, Apr 6, 2021
    #22
  3. Benny71

    Benny71 Silver Member

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    I got it through Jordan at Overspeed Motorsports in New Orleans. Nice guy. He actually talked me out of buying a built motor seeings that my power goals ultimately are 350-360hp which is totally doable on stock block DD. Spending extra money didn’t make sense for my situation.
     
    Benny71, via an iPhone, Apr 6, 2021
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  4. Awafrican

    Awafrican Moderator Silver Member

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    +1 for overspeed
     
    Awafrican, via a mobile device, Apr 6, 2021
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  5. Duey1083

    Duey1083 Gold Member

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    Does he warranty a stock build at those power levels?

    Asking out of curiosity...also wondering if a mild build would be good. Like stock pistons with better rods or something.
     
    Duey1083, via a Samsung mobile device, Apr 6, 2021
    #25
  6. Awafrican

    Awafrican Moderator Silver Member

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    Simple piston and rods to me always seems like a good idea that being said if Jordan has a stock block in good shape and the price is right I totally get it heck if I had to do anything right now that's what I'd do (some house projects on the go)
     
    Awafrican, via a mobile device, Apr 6, 2021
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  7. Benny71

    Benny71 Silver Member

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    There is a one year warranty.
     
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  8. Mackinnon

    Mackinnon Greenie N00B Member

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    My car is misfing on cylinder 3 as well I put new plugs ans coil packs In it did the compression test everything all cylinders were the same compression, some times it bucks and misfires then somedays it don't I been reading everyone's comments and trying to diagnose it myself but I can't seem to find the issue, the only thing I didn't check was my fuel injectors, i got gas on Friday parked my car and started it Saturday and its been acting up since if anyone of yous can help me I greatly appreciate it
     
    Mackinnon, via a Samsung mobile device, Apr 7, 2021
    #28
  9. Easter Bunny

    Easter Bunny Professional Engineer Platinum Member

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    You should starts new thread it will get more visibility
     
    Easter Bunny, via a mobile device, Apr 7, 2021
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  10. The_big_dill

    The_big_dill Greenie Member

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    @OP, that damage is quite severe, and It looks like you have a handful of power mods and a tune.

    How long have you been on the latest tune? Were the injectors you replaced the originals on your engine?

    Did you monitor data after injector swap to make sure there wasn't knock?
     
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