>My 85 Westy is running very rich. Symptoms are black smoke, poor gas >mileage and lack of power. >The following parts were checked by replacing with a known good part >fuel injectors (mine weep a little, but not serious) >coolant temperature sensor >ECU >Air Flow sensor >Oxygen Sensor > >The fuel pressure is OK (30lbs). >Fuel pressure regulator is OK. >Timing & advance is OK. >cylinder pressure is relatively OK (125 psi on 1&3, 150 on 2&4). >>Hi = >>I had the same thing with my 85 westy turned out to be a bad wire going= > >>from the o2 sensor to fuel injection computer. The wire is coax and was= >>kinked by something in the harness, giving the computer the full lean >>signal, so the computer responds with full rich. >>good luck >>joe 85 westy 177k >> =46rom the O2 sensor to where it connects to the wire harness is a single= wire (no coax). From the connector to the ecu it is coax. The shield is= connected to pin 6, a wire from the air flow sensor. I found the center conductor of the coax is shorted (intermittently) to the shield. Are you= saying this is NOT OK? Thanks John Fleming 85 digismoke
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