i am currently running a d16y7 w/z6 manifold converted to mpfi....the problem ihave is the p28 ecu not looking for o2 sensor so cars running pretty rich n doesnt like low throttle....could ecu be bad

 

how do you know its not looking for an o2 sensor? is it even a stock computer? also the p28 maps may not be too great with the non vtec engine.

 

because my boss where i work and his partner the other mechanic checked it out with all there fancy tools lol....but iwired everything how it said to do with the rywire subharness exactly and still nothing... i even bought a fuel/ratio guage to see if it was working and it doesn't read nothing only when i first start my car it lights up

 

i have the same problem with my P28. Well similar. My p28 looks for a o2 but not a 4wire one. instead it looks for a 1wire o2. everytime i tried to hook up a 4 wire oxygen sensor it throws a code for o2. I've tried a OBD1 PR4 ecu and my wiring for the o2 works just as it should. My P28 is chipped. I hope you figure out whats wrong because i've been trying to solve this mystery for a year.

 

no i havnt im about ready to go and buy another one just to try and c if that one works...ireally dont want to run a regular po6 i like how high the p28 can rev up too ill let you know