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Mapped car on normal Unleaded?

Discussion in 'A3/S3 Forum (8L Chassis)' started by Els, May 16, 2010.

  1. Els
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    Els Member

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    [May 16, 2010]
    Chaps,

    My car has been running a bit iffy the last week. (Bit hesitant, feels down on power and doesn't feel as if its coming on full boost all the way through the revs, just seems limp!)

    I have thought about MAF's and coilpacks but it also occurred to me that it started the day I filled up with fuel.

    I always run it on high octane fuel, but I had no where to go so the normal Texaco stuff was put in!

    Do you think this could play a part in the **** running on a mapped car? (MTM Map)
    #1
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  3. voorhees
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    voorhees Moderator Staff Member Moderator

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  4. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [May 16, 2010]
    your ECU will back the timing off and reduce the power to account for the poor grade fuel, there shouldnt be any long term effects from it
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  5. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [May 16, 2010]
    agreed, i went back to normal unleaded as couldnt see the difference, then tested with and without and it does exactly what Mark says
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