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2012 1.8T Passat - Misfiring

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  • 2012 1.8T Passat - Misfiring

    Hi guys,

    * Edit it's a 2011 Passat.

    We bought the car off a private seller, it's a 1.8L turbo which was working fine and a few days later cylinder 2 started misfiring, took it to the mechanic who replaced the spark plugs and all was well again.

    A few days after that I get the error cylinder 3 is misfiring, P0303 I think it was. EPC and CEL lights were on. Same as before when we got the error for cylinder 2 P0302. Car's throttle at both times was dead and the car was idling very rough.

    It's now been at the mechanic's for a week where they've replaced the wiring (not sure exactly, my dad's managing it) and it stopped for 1 day but got the same error the next day.

    Mechanic, and sorry for the lack of detail, will be checking the injectors and the manifold. It may appear the injector is spraying too much petrol. Any way that's the theory, but I thought I'll reach out online to the guru's to see if they know how to fix this problem?

    Thank you in advance for reading and your input.

    Cheers,
    adg3

  • #2
    Anyone?

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    • #3
      Not sure where you’ve taken it but I’d make sure whoever is working on it knows VWs. Otherwise you could be paying for their diagnosis by replacement ideology.


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      • #4
        Plug leads and coils would be logical
        2021 Kamiq LE 110 , Moon White, BV cameras F & B
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        • #5
          Perhaps #3 coil pack was dead, but was mistakenly fitted to #2 cylinder?
          '07 Transporter 1.9 TDI
          '01 Beetle 2.0

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          • #6
            Originally posted by tigger73 View Post
            Not sure where you’ve taken it but I’d make sure whoever is working on it knows VWs. Otherwise you could be paying for their diagnosis by replacement ideology.


            Sent from my iPhone using Tapatalk
            First mechanic was a VW specialist.
            I may have to take it someone else as the guys now working on it can't figure it out.

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            • #7
              Originally posted by Umai Naa!! View Post
              Perhaps #3 coil pack was dead, but was mistakenly fitted to #2 cylinder?
              Perhaps, but that would have been 5 months ago since that was the last time any of this was touched. Looking at the receipts they only changed the spark plugs.

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              • #8
                Seems like it was a coil pack that fixed it (for now, still testing)

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                • #9
                  Good Luck

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                  • #10
                    Originally posted by sn809 View Post
                    Good Luck
                    Thanks mate.

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