found a disconnected wire near ecu. [Archive] - Toyota MR2 Message Board

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Hey guys, ive been exploring my engine bay, since i just got the car a few weeks ago. Its a 1990 3sgte. Running 18psi. The car runs well, rich as f#@k, but still well. I was just tracing wires and found this weird black data cable going through to the ecu from the engine bay, but its been cut and not connected to anything at the head either. Amy idea what it may possibly be? Ill post pjcs if you guys have no idea wht im talking about. Ive been trying to figure iut whatvthe previous