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Thread: Misfire when i give over 1/2 throttle?

  
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    c20let2k's Avatar
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    Misfire when i give over 1/2 throttle?

    Yes, my z20let just misfire, feels and sounds, like it's just running on 3 cylinders sometimes, and the engine light starts to flash..
    If i than stops the engine and starting it right away it works just fine, until i give 1-2 gas..

    I was washing my engine a couple of days ago, and it workes just fine the same day that i washed the engine..

    If i drive slow og just let the engine run IDE, it running normal..
    This have happend once before, the problem disappeared i couple of days after..

    What's the reason for this? Anyone that have experienced this?

    Maybe some moisture at the coilpack?

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    dannysport18's Avatar
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    Easy one I have done this in the past
    some water has gone down ontop of the Plugs mate
    pop out the coilpack and some water will be on top of the Plugs thats all
    just dry it out
    some WD40 in the ends of Coil pack an it will be fine
    you will also need to clean tips of Plugs

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    rizo's Avatar
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    the plugs could have had it mate, hapened to me, got some new plugs and it was fine.
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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    Plugs, coilpack or airflow meter.

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    I am suffering the same problems on my zafira gsi could there be any others causes of this?
    Would an obd reader pick up the fault?

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    As Dannny said water in the plugs had this before it sounds like a Subaru plugs out and WD them and the coilpack and leave for a little while before putting them back in

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    Quote Originally Posted by James5 View Post
    I am suffering the same problems on my zafira gsi could there be any others causes of this?
    Would an obd reader pick up the fault?
    coilpack, plugs, MAF it would prob just show random multiple misfire

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    Cheers will try the wd40 I have taken the coil pack out and the sparkies and there was some water in the number 1 coil pack?

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    Hi m8. I am having the same problem as you, but only when i floor it in 3rd, 4th, 5th. I changed the coil pack and nothing . Today i will get the spark plugs fitted and probably the fuel filter. I will come back to say if there is a difference. Same thing i was going here http://www.astraownersclub.com/vb/sh...blems+missfire only mine is a litlle strange, cause there is no water on the spark plugs or on the coil pack.
    Astra Coupe Z20LET EDS stage 2


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    Quote Originally Posted by florinike View Post
    Hi m8. I am having the same problem as you, but only when i floor it in 3rd, 4th, 5th. I changed the coil pack and nothing . Today i will get the spark plugs fitted and probably the fuel filter. I will come back to say if there is a difference. Same thing i was going here http://www.astraownersclub.com/vb/sh...blems+missfire only mine is a litlle strange, cause there is no water on the spark plugs or on the coil pack.
    I am thinking sparkies have had it on mine as the coil pack was only replaced 4 months ago I will try and get some more today


    Keep me posted on what solves it for you

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