Hi, I'm doing an obd0-1 conversion and this is my last code. ECU is a p28.

This is how I have it wired:

A6-PO2SHTC O2 sensor heating element to heater wire
B1-IGP2 Battery positive from Main relay to heater wire
D14-PHO2S O2 sensor , heated 02 sensor Signal to signal wire
B2-LG2 ground to ground wire

observations:
-no code at engine start, code comes on in about 30 sec
-when code comes on idle goes up
-cel is spastic (is that the right word?) it goes on and off for a minute then stays on
-engine runs full rich when cel is on
-A6 heater control wire doesn't show batt voltage with key on engine off or on, also doesnt show batt voltage at ecu pin

Any ideas? It's a new bosch o2 sensor, the one that I had on there was new too but I thought it might be the problem so I got a new one, same problem.

Is there a way to get the ecu to ignore this or ignore the o2 altogether and run in open loop all the time? My p28 is socketed and chipped and i have a burner.

 

Sounds like a bad ECU.

 

wow, that would really suck. I don't have the money for a new ecu right now. is there any other possibility or a way that I can get it to run without the o2 sensor or at least stay out of limp mode?

 

Not that I know of. The A6 pin of the ECU seems to be the culprit. Make sure it isn't damaged. If it's fine, then you'll probably need to replace the ECU.

 

universal o2? if it is then get a oem o2. i had the EXACT same prob. i was usin universal and and same code plus i was gettin wierd idle...got an oem obd1 o2 and it ran like a champ

 

i didnt read the rest but ya my was a bosch too! brand new i threw that **** away lol