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  1. #1
    Veteran Member Three Rings jm121189's Avatar
    Join Date
    Jun 05 2007
    AZ Member #
    18585
    Location
    Portland, ME

    EPC Light questions

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    So today something new happened and it scared the shit out of me since it has never happened before. I was pulling away from a light at a moderate pace shifted into second waited a second and gave it a little throttle and then all of a sudden the throttle has no response and car sounds funny and the EPC light came on. I pull over and restart and the problem is gone. I get out the manual and read about the light, sounds like limp mode. After restart the car runs and sounds exactly like it always has, probably 20min later it did this again and I think it was similar conditions. It seems like under part throttle there is a little surging because the car jerks just a little. I don't think it's a misfire since it doesn't feel like a loss of power and the plugs/coils have <5k miles. At WOT and little throttle it's fine but in the middle it seems to act a little funny. I have a 710n dv which I think is good since it seems to hold boost fine when you really get on it. I haven't been able to pull any codes since the shop isn't open till tomorrow. I think it might be the n75 valve but what do you guys think?
    2000 1.8t A4 qtm gone but not forgotten
    2008 R32
    2015 S4

  2. #2
    Veteran Member Three Rings jm121189's Avatar
    Join Date
    Jun 05 2007
    AZ Member #
    18585
    Location
    Portland, ME

    Re: EPC Light questions

    I just went out and tried to get this to happen again and no matter what I did it wouldn't happen, I guess this is good. Car felt 100% normal I'd still like to hear what people think.
    2000 1.8t A4 qtm gone but not forgotten
    2008 R32
    2015 S4

  3. #3
    Veteran Member Four Rings maxspeed's Avatar
    Join Date
    Dec 14 2005
    AZ Member #
    9231
    Location
    Shakedown street, NY

    Re: EPC Light questions

    ill bet you five dollars you have a torque monitor limit exceeded code.
    2000 Audi A4 1.8TQM - RIP
    1999 Subaru Outback

    When your spirit is floating down that tunnel, towards the light, You know what's behind the light?
    It's not God, it's me. And I'm gonna kick your poncey soul All the way back down the tunnel 'till you choke on your own fucked up ribs! Now, Wake the fuck up!

  4. #4
    Veteran Member Three Rings jm121189's Avatar
    Join Date
    Jun 05 2007
    AZ Member #
    18585
    Location
    Portland, ME

    Re: EPC Light questions

    What would that mean and should I be worried? How would it be fixed if it's a problem.
    2000 1.8t A4 qtm gone but not forgotten
    2008 R32
    2015 S4

  5. #5
    Account Terminated Four Rings mike-2ptzero's Avatar
    Join Date
    Jul 07 2004
    AZ Member #
    2716
    My Garage
    630AWHP A4, Nissan Titan
    Location
    socal

    Re: EPC Light questions

    If it is a tq limit code you need to call up Revo and tell them they need to change the tq limiter settings. GIAC ran into this issue way back in 2001 with my custom K03 tuning and it happens with the J31 file. It seems to only happen during very light throttle and at low rpms.

  6. #6
    Veteran Member Three Rings jm121189's Avatar
    Join Date
    Jun 05 2007
    AZ Member #
    18585
    Location
    Portland, ME

    Re: EPC Light questions

    Doesn't it seem strange that it would happen today after I've been chipped for 5 months and I don't think there were any special conditions today? Is this something that can be done with lemmiwinks?
    2000 1.8t A4 qtm gone but not forgotten
    2008 R32
    2015 S4

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