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Fuel trim

Discussion in 'Z3 Roadster & Coupé' started by Raddy, Jul 14, 2014.

  1. Raddy

    Raddy Regular Member

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    Car has been chugging when cold then ok when warm ,sometimes revs ok,sometimes not , think May have slight hole in pipe between the box, diagnostic box says fuel trim ?can anyone help thanks
     
  2. GazHyde

    GazHyde The Gaz Monkey
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    Hi Raddy,

    Does it have a code with the error message? The codes are usually more helpful than the descriptions!

    Gary
     
  3. Raddy

    Raddy Regular Member

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    Will get back to you when light comes back on as I pressed erase ,sorry
     
  4. GazHyde

    GazHyde The Gaz Monkey
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    OK, it's possible someone may be able to answer with the description you gave. I'm just used to the fault codes that's all!
     
  5. jonco

    jonco Zorg Guru (III)
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  6. Raddy

    Raddy Regular Member

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    Just got info- code PO 170 fuel trim bank one - and code PO 130 O2 sensor circuit bank 1 sensor 1 any help gratefully appreciated , just want her running right very embarrassing at moment
     
  7. GazHyde

    GazHyde The Gaz Monkey
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    Just had a scan back through your previous posts to get your engine type -- 2001 1.9 -- should help people out with the diagnosis ;)
     
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  8. Raddy

    Raddy Regular Member

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    Cheers Gaz fed up of getting honked at lol
     
  9. GazHyde

    GazHyde The Gaz Monkey
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    I can imagine that's wearing thin.. I'm guessing its going to be one of the sensors, but not 100% sure myself...
     
  10. zedonist

    zedonist Guest

    These might help:
    image.jpg image.jpg
     
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  11. zedonist

    zedonist Guest

    I think the first course of action is to rule the P0170 code out as the cause, I.e. Check for obvious leaks etc in the intake and vacuum systems.
     
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  12. Raddy

    Raddy Regular Member

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    Can you elaborate on the vacuum system part as I'm flying blind here , thanks
     
  13. zedonist

    zedonist Guest

    Any and all rubber hoses around the induction and cylinder head covet and plenum chamber, fetch them off, check for cracks and splits
     
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