PLEASE HELP- cant figure out the problem (O2 sensor wiring) (att anyone with a vx)
Problem: running extremely rich (4 x leagal limit)
Car:...................93 civic vx..............................OBD1
Engine:...............98 B18c1................................OBD2
engine harness:...98 B18c1 (from same car).......OBD2
main harness:......93 civic vx..............................OBD1
ECU.....................95 gsr (P72)...........................OBD1
This is what I did already: I just checked the wiring of the MAP, TP and O2 sensor. I followed all of these from the ECU pinouts to the actual sensors. I verified that the colors matched the pinouts from a Helms (92-95 civic) and then I simply followed the colors as they were different on the engine harness (98 GSR harness). Everything looks good.
Questions:
1. I didn't see a 2nd O2 sensor female plug on the engine harness. Shouldn't I
have? It's a 98 engine harness!! It should have another plug right?
2. Could my problem now be my ECU? I mean what else is there to check for
air/fuel besides MAP, TPS and O2?
3. Does this limit out electrical and now its probably mechanical?
4. Should I just run new wires to the O2 sensor to be sure?
PLEASE ANYONE HELP! I DONT WANT TO HAVE TO SELL MY CAR!!! I CAN'T GET IT SMOGED!!!
Car:...................93 civic vx..............................OBD1
Engine:...............98 B18c1................................OBD2
engine harness:...98 B18c1 (from same car).......OBD2
main harness:......93 civic vx..............................OBD1
ECU.....................95 gsr (P72)...........................OBD1
This is what I did already: I just checked the wiring of the MAP, TP and O2 sensor. I followed all of these from the ECU pinouts to the actual sensors. I verified that the colors matched the pinouts from a Helms (92-95 civic) and then I simply followed the colors as they were different on the engine harness (98 GSR harness). Everything looks good.
Questions:
1. I didn't see a 2nd O2 sensor female plug on the engine harness. Shouldn't I
have? It's a 98 engine harness!! It should have another plug right?
2. Could my problem now be my ECU? I mean what else is there to check for
air/fuel besides MAP, TPS and O2?
3. Does this limit out electrical and now its probably mechanical?
4. Should I just run new wires to the O2 sensor to be sure?
PLEASE ANYONE HELP! I DONT WANT TO HAVE TO SELL MY CAR!!! I CAN'T GET IT SMOGED!!!
if you're running OBD1 there is no second O2 sensor. the second O2 harness would be on the chassis since the rear one is further back after the cat.
which ECU are you running? chipped?
are you setting a CEL?
are you running an OEM cat or high flow?
are you running cam gears? set them to zero or swap in your stock ones makes a HUGE difference to emissions.
check my site for VX swap wiring help.
which ECU are you running? chipped?
are you setting a CEL?
are you running an OEM cat or high flow?
are you running cam gears? set them to zero or swap in your stock ones makes a HUGE difference to emissions.
check my site for VX swap wiring help.
Originally Posted by Relic1
if you're running OBD1 there is no second O2 sensor. the second O2 harness would be on the chassis since the rear one is further back after the cat.
which ECU are you running? chipped?
are you setting a CEL?
are you running an OEM cat or high flow?
are you running cam gears? set them to zero or swap in your stock ones makes a HUGE difference to emissions.
check my site for VX swap wiring help.
which ECU are you running? chipped?
are you setting a CEL?
are you running an OEM cat or high flow?
are you running cam gears? set them to zero or swap in your stock ones makes a HUGE difference to emissions.
check my site for VX swap wiring help.
no CEL codes
OEM cat
Motor is completely stock


