i've also changed my r32 gtst 2 a manual and am still running the auto ecu, have had no prob's in the two years its been in, you could have probs with your knock sensors, you can run your car in diagnostic mode to see if is your knock sensor, to do this u need to un bolt ur ecu from the kick panel wall so u can see the the red light and screw selector. Once u have done this switch the ignition on but dont start it, the led on the ecu will be glowing, turn the selector screw clockwise all the way gently, wait a couple of seconds , then turn the screw back counter clockwise, the engine check light on the dash will mirror the LED on the ecu.
the LED will flash out a codeor series of codes if theres more then 1 prob, first digit will be shown by a long flash & second digit will be shown by a short flash, eg long, long, short, 21. the codes are
11 crankshaft position sensor
12 MAF sensor circut
13 coolent temp circut
14 vehicle speed sensor circut
21 ignition circuit
31 ecu
34 knock sensor
43 throttle position sensor
45 injector leak
51 ignition circut
54 auto signal to ecu
55 all ok
turn the ignition off to put the ecu bak 2 normal. so try that and see what happens.
