Help needed / Point me in the right direction.

Discussion in 'Mazdaspeed 6 Build Diaries' started by acidplant, Jul 21, 2021.

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  1. acidplant

    acidplant Greenie N00B Member

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    Good day to all. I have a Mazdaspeed6 which has been giving me some issues. One was a stuttering problem at idle and accelerating. I changed all spark plug and coil pack. and the stuttering became much more noticeable that it does not have much power at all, as if it is only firing on 3 cylinders. I upgraded the internal tank fuel pump, cleaned and change all )-rings on the HPFP, changed the pressure valve and sensor on the fuel rail. And still no change in the stuttering. Next thing I plan on doing is getting injectors cleaned. But before I do that i decided to run an Autel diagnostic on my car. And this is what came up. Can anyone help or point me in the right direction for this.
     

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  2. _Mazdarati

    _Mazdarati Resident Asshole Silver Member

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    Did you recently replace the MAF?
     
    _Mazdarati, via an iPhone, Jul 21, 2021
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  3. Solarsurge

    Solarsurge Greenie Member

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    I was thinking dirty/bad MAF sensor also. You can clean it by spraying it down with electronics/MAF cleaner you can buy at any auto parts store.

    As for the EVAP code, that is a separate issue entirely than the IAT sensor and is likely something not sealed properly from when you did your new fuel pump. Get that checked 100%

    Sent from my iPhone using Tapatalk
     
    Solarsurge, via a mobile device, Jul 21, 2021
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  4. Awafrican

    Awafrican Moderator Gold Member

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    P0442 is probably a poor seal on the gas cap, replacing the cap should fix it. If not could be purge valve to.

    Was the new MAF OEM and known working? If it's not OEM or used could certainly be bad but they giving it a clean
    Coil pack again hopefully OEM only otherwise you're going to have a bad time

    Otherwise yes leaking Injectors / gummed up will certainly cause issues
     
    Awafrican, via a mobile device, Jul 21, 2021
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  5. Easter Bunny

    Easter Bunny Professional Engineer Platinum Member

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    Did you gap the new spark plugs to 0.027?
     
    Easter Bunny, via a mobile device, Jul 22, 2021
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