93 dohc 240sx dohc running rich.....

[sidewaysdan]

1990 240sx swapped a 93 dohc into it running rich all the time replaced temp sensor, cat, o2, plugs, wires, cap and rotor, ......if i unplug my coolant temp sensor the engine smooths out any ideas????? i used the ecu and harness for the dohc also only thing i cut was the wires to the cluster they all work except for the tach of course.....

[WWJD]

make sure your sensor is worken'. sound's like it's gone bad