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Loss of power after super-unleaded shortage :(

Discussion in 'A3/S3 Forum (8L Chassis)' started by joshxs, Oct 15, 2007.

  1. joshxs

    joshxs Member

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    Not happy :( My gorgeous '00 S3 is running like a 1.6 A3!

    I have had to resort to running on standard 95 octane unleaded for a couple of weeks due to supply problems at all the garages in my area.

    Finally got a nice full tank of 99 super in last week :) However, my car still runs like poo :( I have cleaned out my MAF sensor, intake to the throttle body and pulled the battery for a few mins.

    Arrghh! Any ideas out there? Am I running in a 'limp' mode and does a battery reset fix this?

    TIA
    J
     
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  3. jojo

    jojo Looking for Boost!
    Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    Limp mode should be reset the moment you switch car off and back again, it's like running a 1.8 n/a, with the turbo literally not running. Have you tried running the car with the MAF unplugged?
     
  4. joshxs

    joshxs Member

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    Turbo is definately going, though how well is another question. You can hear Darth Vader noises coming from the engine, so I know it's recirc-ing.

    Talking of noises, the engine sounds awful at the mo, has sounded like this since I had to use 95 octane unleaded. Has lost the nice throaty growl, now just sounds a 'bit flat'.

    I will unplug the MAF, and see how it goes. - cheers
     
  5. Aky

    Aky Aky

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    Not technically minded but could it be your DV?
     
  6. joshxs

    joshxs Member

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    Pulled the MAF sensor this morning, seems to be an awful lot better! Has anyone fitted a euro car parts one or similar pattern part? I'm assuming Audi will be very expensive for this part?!
     
  7. TheSpaceCowboy

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    From what you've said it sounds like you've figured it out, but just to add I have seen people on here say it takes about a tank and a half to 2 tanks of 99octane for the engine to adjust.
     
  8. jojo

    jojo Looking for Boost!
    Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    Good work there, replacement from Audi should be £80 exchange for your old one, aftermarket one is around £55, and that's just the sensor part, you need torx screw set to swop them over. :icon_thumright:
     
  9. jesters3

    jesters3 Active Member
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    Do you have to pay a 'deposit' to do this? Do you have to change it there and then or do they give you a grace period? Cheers
     
  10. jojo

    jojo Looking for Boost!
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    I think you need to pay the full amount, don't know how much?, then claim it back upon returning the used part, might aswell just turn up with a toolkit and do it outside!
     
  11. jesters3

    jesters3 Active Member
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    Nice one, better give them a call and get mine sorted. Got a dodgy lumpy idle going on!
     
  12. Meza

    Meza Member

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    I paid £75 inc vat for mine from Audi Northampton and a £20 deposit on the exchange.
     
  13. jesters3

    jesters3 Active Member
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    Just picked up mine from Ridgeway Audi.

    Luckily they had one in stock when i went and picked up some PS fluid. For those after more info:

    MAF (Mass Air Flow Sensor) Part Number for a BAM 225hp S3: 06A906461MX

    £64.00 + VAT for the MAF
    £20.00 + VAT for the Surcharge - refundable on return of the old MAF in the new MAF box.

    Just fitted it. Very straight forward. Wish I did it sooner!

    Remove Air box Cover
    Unclip TIP
    Unplug the sensor
    Pull off the top of the air box so it is 'free'
    Unscrew the two screws that hold the MAF in
    Pull out the old MAF
    Whip in the new on
    Rescrew
    Refit top air box
    Fit the Sensor
    Clip the TIP
    Replace Air box cover
    Start her up!

    The dodgy lumpy idle has gone so far so here's hoping!

    Cheers all

    :icon_thumright:
     

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