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    Thread: bought used apr stg 1 ECU for B5 S4. HAVING ISSUES

    1. 09-01-2012 02:28 PM #1
      so i bought a ECU off fourtitude. its a stage 1 for the b5 s4 6 speed manual trans. i disconnected the battery, swaped them out, and when i start the car with the new ECU, first of all it idles about 100 rpm lower than it usually does with stock. and the ABS and traction control light is on. it seems that i have no abs when i break. and thirdly when i hit it in first gear, it kind of jerks back and forth.. is it my car, or the ecu?! the car drives fine when in stock.

    2. Member
      Join Date
      Feb 13th, 2009
      Santa Cruz, Ca
      B5 S4, MK1 Rabbit
      09-01-2012 05:28 PM #2
      are you sure its the right ECU for your car? What letter box is it, and what year and specs are your car?
      '01.5 Silver B5 S4 - Follow my build thread here: http://www.audizine.com/forum/showth...4-Build-Thread

    3. Member davisgti's Avatar
      Join Date
      Oct 23rd, 2011
      vw gti 2001 20v turbo, B5 AUDI S4
      09-08-2012 05:20 PM #3
      yes i think what you did is got a ecu from a 2000 beacuse the 2000's dont have tc and stuff you need to get the right ecu for your car bro!

    4. Former Advertiser
      Join Date
      Sep 14th, 2012
      09-20-2012 01:07 PM #4
      Check the p/n on your origional ecu and make sure it matches up with the ecu that replaced it.

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