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alright well thanks anyway. just ordered a shop wiring diagram manual for the sc300. hopefully will get it soon so i can get this rollin'
Naa my bros sc300 is a factory auto. For the speed sensor i just hooked up the signal wire from the vss on the tranny right to pin 2 on the small ecu plug. Im running a ar5 transmision which is supposed to be a updated r154 that doesent use the mechanical style signal but a vss signal. I have a dakota digital sgi5 but not sure if i need to hook it up in between the ecu and the vss tranny sensor. It seemed to make alittle difference but it still cuts out. I maneged to do a weak brakestand with the front of the car facing up a hill. Definatly doesent hit the rev limitor. I compared reving to my bros stock sc and his shits revs way higher.Again, SPEED SENSOR.
Zoot, Was your brothers "SC" ecu a 5-speed model? i believe only the auto ecu needs a SPD signal. so if you did not wire it and then you "fixed" the problem by attaching a Manual ecu then you may not have had a bad ecu in the first place...