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

[mnajjar]

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.

[BlkdoutS4]

are you sure its the right ECU for your car? What letter box is it, and what year and specs are your car?

[davisgti]

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!

[Richard@VerdictMotorsports]

Check the p/n on your origional ecu and make sure it matches up with the ecu that replaced it.