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Thread: why won't my z20let fire?

  
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    z20leter's Avatar
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    why won't my z20let fire?

    Does anybody know why my z20let won't fire, i have changed spark plugs so it not them tho the old ones were covered in oil,

    Only fault codes i have are o2 sensors but that won't stop it from starting.


    Anyone else got any thoughts?

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    DaveDempsey's Avatar
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    If youve got fault codes for 02 sensors then replace them, or try another set first then re-try.

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    is it sparking? If not that would explain the dirty plugs and O2 readings. If it isn't firing then the petrol is washing the carbon out of the combustion cahamber (oil on plugs!!!!) and O2 sensors are getting really confused by the fuel in the exhaust.

    To fire up the fuel pump and the ignotion the ecu needs a signal from the crank sensor. Check if your fuel pump is running, if so then the crank sensor is ok. Next check the wiring to the coil pack. If the plugs are soaked in petrol they will be knackered. Never know why they get knackered but they do if covered in petrol, you can't recover them unfortunately

    Bets of luck
    Be Happy


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