misfire code

Discussion in 'Modifications And Maintenance' started by rshoop2, Jul 13, 2013.

  1. rshoop2
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    rshoop2 Well-Known Member

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    I have a 06 sti.I got pulled over for loud exhaust so I welded the stock muffler back on but couldn't reach the top very well (small leak) car ran normal. 2mo. later I changed plugs (went to E3s) car still running fine. wife noticed car sounds louder,this is 3 mo. after plug change.now I can feel miss at idle and getting cell,no miss over idle rpm. any ideas? thanks
     
    rshoop2, Jul 13, 2013
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  2. JasonoJordan
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    JasonoJordan Well-Known Member

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    With the exhaust leak could be playing hokie with your backpressure at idle.
     
    JasonoJordan, Jul 13, 2013
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  3. Nuke
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    Nuke Well-Known Member

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    Compression test
     
    Nuke, Jul 13, 2013
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  4. Subie Lovers
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    Subie Lovers Well-Known Member

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    Ringland of doom?!?!

    PS... Pull the codes and get back to us!!!
     
    Subie Lovers, Jul 13, 2013
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  5. FlatBlackIan
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    FlatBlackIan Active Member

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    A leak that far back won't have any effect. Pull codes and check compression. Could have a faulty plug (hope), or bad ring land.
     
    FlatBlackIan, Jul 14, 2013
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  6. rshoop2
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    rshoop2 Well-Known Member

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    codes are po301 & 302 I've been checking on line and it looks like good luck to me, could be 1 of 15 different things. thanks for the help
     
    rshoop2, Jul 15, 2013
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  7. AWDimprezaL
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    AWDimprezaL has more posts than you

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    First order of business, swap coil packs from side to side, see if it follows.
     
    AWDimprezaL, Jul 15, 2013
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  8. bikerboy
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    bikerboy Subie GOD

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    What AWD...L said. What model spark plug did you install?
     
    bikerboy, Jul 15, 2013
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  9. bikerboy
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    bikerboy Subie GOD

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    What AWD..L said! What model plug did you install?
     
    bikerboy, Jul 15, 2013
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  10. rshoop2
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    rshoop2 Well-Known Member

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    update replaced E3 with denso problem solved! yea
     
    rshoop2, Jul 28, 2013
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