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2011 Holden commodore misfiring

Discussion in 'General' started by Combatjane91, Jan 16, 2020.

  1. Combatjane91

    Combatjane91 New Member

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    Hey,
    So I’ve noticed lately my 2011 Holden commodore wagon has had an issue with a few things... first thing that came up was the engine light would come on and stay on until I’d fill the tank with premium petrol and then it would go away, second thing is when I’m driving her I found as I’d hit 60kms she’s start misfiring until I either slowed down or sped up and I’d hear popping sounds from the muffler... third issue is the misfiring and power of the overall car would considerably lower when the AC is on and I have no idea why? She’s been regularly serviced and taken care of so before I take her to the mechanic I’d like to pick the brains of you intelligent folk so I had some sort of idea what to ask for to be checked.... be kind in not mechanically minded so if I’ve worded it wrong it’s because I don’t know
     
  2. Fu Manchu

    Fu Manchu Well-Known Member

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    Check fuel pressure.
    Check injector function
    Check coil function
    Check spark plug condition.
    Check accessories for worn bearings, belt wear, etc.

    A misfire should normally set a code which can be read by diagnostic tools. That will tell us a whole lot more.
     

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