ok i have a 1990 integra, and it's throwing a code 43.. i'm basically getiing 150 miles per tank! just yesterday i replaced the o2 sensor and reset the ecu and it's still throwing the code.. currently i'm running a vortech 12:1 fmu and a msd inline fuel pump (turbo car) does anyone know what it might be? maybe fuel injectors? fpr? fuel filter? i can't quite seem to figure out what it is.
thanks

 

ttt

 

Code 43 if im not mistaken .. was the Heater circuit of the O2 sensor ...

if you replace the O2 and still get that ... your ECU must not like the 02 you put in there or you **** the connector plug up... like accidently pulled some of the wire from the connector ?


my guess is its prob the sensor you put in ...

i bought an OEM spec one off of http://www.oxygensensors.com/ it got to me really fast and worked like a champ .. no CELz in my 1995 LS

 

hmmm... well the one i got was a borg warner one that says it was made for a pre obd integra.. so i duno.. i didn't think they would sell me the wrong part.

 

I forget what the name brand of mine was ... but if you have a 94 you have a OBD I ECU ... so you need to get the appropriate Oxygen sensor

 

Ohhhh you have a 1990 .. my bust ... im not sure .. might want to double check if Code 43 on OBD 0 is the same on OBD I probably though if you just replaced the sensor and its doing it ....

on the OBD I O2 sensor harness... you could disconnect the 2 black wires from the O2 sensor and hook them together with a .5watt 1k ohm resistor and the CEL 43 would be remedy but thats on my 95 ... your heater circuit wires might be a different color ... try looking in a shop manual