>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