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pparra

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  • From
    Alpharetta GA USA
  • Present cars
    2002 911 Targa

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  1. Hi JFP, Thank you for your answer. Sorry I turned in wrong information, I ddi not read my ODB scanner correctly, I have both P0491 and P0492 not just one bank, now I understand better what to check starting from the air pump that I am sure pump is blowing strong, I think next I need to check the air line going to the check valve but if you have any suggestion on what kind of test I can do I will appreciate. Yes head job was done very well by a shop specialized on this kind of head, the SAI passages are cleaned and polished, double checked that during assembly. Thank you
  2. Hi After a complete rebuilt I have the P0491 on bank one only. Any suggestion?
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