missfire + oil in spark plugs.....what happened?

Thread in 'Technical Questions' started by HellBoy98, Jan 2, 2014.

  1. HellBoy98

    HellBoy98 Member

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    hey guyz i have a ca18det recently changed the turbo wich i think might be a bit overboosted(stock engine+t25) , did a few runs and suddenly a missfire is taking place before 2000rpm, i also noticed a small lost in power. Checked spark plugs, found some oil, what to do? what could it be? i'm afraid i might need a rebuild as i have an oil leak in the head....
     
  2. 1N5_N15

    1N5_N15 Member

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    Compression test would be first thing to do
     
  3. 200sx-s13-1993

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    Is there any oil in the inlet manifold pipe?
    are you sure its oil and not petrol? eather way if the plugs have been wet with oil or petrol you will have to change them, thats where i would start and if when new plugs are in and you see the slightest miss out of it cut the engine and see if there is still oil-petrol on the plug's?
    hope this helps :)
     
  4. Turbo ted

    Turbo ted Member

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    I agree,check compression first,could show many issues.
     
  5. turbosteen

    turbosteen Member

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    Or test it with a leakdown tester
     
  6. SteveC200

    SteveC200 Used to drift, now I don't.

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    Or just clean and dry them.
     
  7. 1N5_N15

    1N5_N15 Member

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    Do this next if compression test results are not correct
     
  8. smokebillowing

    smokebillowing Active Member

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    Have you recently filled it with oil? I did that once with my CA and due to the location of the oil filler you tend to get spillage down the cylinder no 1 coil/sparkplug hole? Would definitely cause a misfire.
     
  9. Swampy442

    Swampy442 Active Member

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    Sure its not oil from leaking cam covers thats sat in the plug wells?
     
  10. Blake7

    Blake7 Member

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    Which end of the plug?? Melted piston? Head gasket??
     
  11. nasta

    nasta New Member

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    First do a compression test to be sure for your valvetrain(mainly the valves)and the piston rings.How many kilometers do you have with these spark plugs?
     

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