and yes i have done a search. ek with gsr swap, obd1 ecu throwing code 1, which is primary o2 sensor. i have replaced the sensor, checked all grounds, checked signal input from o2(like .7-.9 mv) while car is warm, have 12v on output to heater. ohmed out the sensor 10ohms. have no shorts, and continunuity from sensor to pins entering ecu, and all is seems ok, and still is throwing the code. is even throwing the code on the obd-2 ecu that i have, so thats tells me that its not the ecu. is there any thing i am missing, this is driving me crazy.

 

anyone

 

no one on here has had or herd of this problem??

 

What year is the motor? OBD1? What harness are you running? Was the car 4 wire before you put the motor in?

I would wire the o2 straight to the ecu and see if that helps.

 

its a 95 gsr motor, with moded stock harness, ecu is a chipped p-28, throws same code with my obd-2 p75 ecu that i use to get through inspection. im working on geting a new harness, like an ex or so. drives my ****** nuts

 

try to disconnect your battery with your ecu out. worked for me