Overboost :(

Discussion in 'Leon Mk2' started by Neilzomg, Jul 8, 2018.

  1. Neilzomg

    Neilzomg New Member

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    Cars been overboosting for about a month. Had it remapped and today had the remap removed but still went into overboost in 5th gear about 60mph. Only ever happens around this speed.

    Had the turbo pressure tested said everything is moving as it should be but still getting an overboost.

    So remap ruled out and actuator etc is moving freely and fine
     
  2. Hawkers

    Hawkers Full Member

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    What happens when it overboosts?
     
  3. Neilzomg

    Neilzomg New Member

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    Limp mode, then turn off restart car back to normal. No engine lights.
     
  4. Pew.

    Pew. Senior Member

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    Waste gate is a usual culprit in overboost situations
     
  5. Neilzomg

    Neilzomg New Member

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    So time to get the turbo ripped out and put a new one in i'm guessing
     
  6. R3k1355

    R3k1355 Senior Member

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    What engine is it???

    Worth checking the turbo actuator and possibly the N75 valve first, and of course the vac pipes.
     
  7. maciek.snow

    maciek.snow Full Member

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    Please do the logging. If its having a hard time to reach the specified boost, and is going into limb mode, then i would say sticky vanes, but lets see what the logs say first

    Wysłane z mojego SM-G930F przy użyciu Tapatalka
     
  8. Neilzomg

    Neilzomg New Member

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    just taking the dive and getting the turbo replaced, hopefully in the next week or so replacement is on its way. Car drives fine aslong as i keep it to 60mph so no overtaking until it gets replaced. If there's anything wrong with the turbo itself at least this will rule it out and i have no idea how old the current turbo is, whistling and siren noises have gotten worse also starting to make a high pitch noise around 3-3.5k revs. Just going to drive it easy until i get it sorted
     
  9. Mobbs69

    Mobbs69 New Member

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    Hi my seat leon cupra tfsi keeps going unto limp mode I've changed turbo changed air intake actuator please help
     
  10. Pew.

    Pew. Senior Member

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    You're going to need to offer up more info than that...

    Any trends on what it's happening, any error codes etc
     
  11. Mobbs69

    Mobbs69 New Member

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    No codes just open her up gets to about 5000 revs then it just goes into limp mode turn car off back on and its ok until I open her up
     
  12. Mobbs69

    Mobbs69 New Member

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    It never went into limp mode until I had new turbo fitted brand new not recon
     
  13. Pew.

    Pew. Senior Member

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    Is the car standard ?
     
  14. Mobbs69

    Mobbs69 New Member

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  15. Mobbs69

    Mobbs69 New Member

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    Off to bed now I'll have a chat with you tomorrow hopefully you might have an idea mate
     
  16. Pew.

    Pew. Senior Member

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    Sounds like sticky veins if there's no fault codes

    Other suspects could be faulty maf or map but typically those would give you codes
     
  17. Mobbs69

    Mobbs69 New Member

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    Sticky veins how would I check that I'm no mechanic mate and maf I've no idea what that is so I'll have to take it to a garage but thanks for the help mate
     
  18. ergrgrtgdrgr

    ergrgrtgdrgr Full Member

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    Mate you should have some sort of warranty on the new turbo take it to the garage that fitted it they should sort it out for you.

    Sent from my SM-G950F using Tapatalk
     
  19. Mobbs69

    Mobbs69 New Member

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    Ok thanks will do
     
  20. Pew.

    Pew. Senior Member

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    Garage all the way, they should be able to pull logs if what's happening to diagnose
     

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