No power no cel

Discussion in 'Mazdaspeed 3 Troubleshooting' started by FreshP_0325, Oct 15, 2022.

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  1. FreshP_0325

    FreshP_0325 Greenie N00B Member

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    Got a MS3 this week, try to repair it but never touched this chassis


    Year/Make/Model: 09 MS3
    Mileage: 140100
    Location: Los Angeles, CA
    Concern:
    1. I can feel the misfire randomly
    2. Turbo only boost to 8-9 psi, 5th gear can hit 12psi but that’s it.
    3. Drove it from tempe, AZ back to LA, terrible gas mileage, 21 on freeway. last owner had 5w20 in motor. Burned 2 qts in 200 miles, after top off some 5w30 it’s burning way slower.
    4. New spark plug on, gapped to 027, still same thing. I can see oil in cylinder 4 thru the spark plug tube. Old plugs shows running rich.
    5. AFR is sitting at 14.90 on idle, while driving lowest it went to 10, running rich WOT, can see black smoke, HPFP press. sit at low 1700 then WOT , 450-550 when idling
    6. Cold side intercooler hose is dry.
    7. No any CEL, not even previously
    DTC's: none
    Modifications: none
    ECU/Tuning Software: Cobb stage 0
    Tuner:
    Is the concern intermittent? : no

    right now I know I need to do these :
    Compression test
    Leak down test
    Check PCV
    Check vacuum leak
    New coil packs
    Whatelse I can do? Should I just get a used motor instead?
    Some one told me maybe cuz there’s a lot carbon buildi around the rings, suggested me pour a lil bit ATF in to the bore and let it set over night to clean the carbon, is that doable?
    *update*
    Compression is good
    180/180/180/180
    Fresh coil packs on, nothing changed
     
    Last edited: Oct 19, 2022
    FreshP_0325, via an iPhone, Oct 15, 2022
    #1
  2. L337TurboZ

    L337TurboZ World Class Truck Squatter Greenie Member

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    Do a compression test and a cylinder leak down test across all cylinders.
     
    L337TurboZ, via a Motorola device, Oct 15, 2022
    #2
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  3. FreshP_0325

    FreshP_0325 Greenie N00B Member

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    Comp is good, 180/180/180/180
     
    FreshP_0325, via an iPhone, Oct 19, 2022
    #3
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