i know dumb question but is it 2? one on the header one on the cat? cuz right now im getting shitty *** gas mileage, and i dont have one on the cat, could i use the 02 sensor from my d16y7 ?

 

theres 2 , and your cel should be on if you don't have the second one

 

yea CEL is on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eastbay925 &raquo;</TD></TR><TR><TD CLASS="quote">theres 2 , and your cel should be on if you don't have the second one</TD></TR></TABLE>

More correctly stated...

OBD-1 has 1 O2 sensor...
OBD-2 has 2 O2 sensors...

so, depending on the year and setup of your engine, it could have one or two. The secondary O2 will not effect mileage if it is bad... The CEL however that is produced by its failure/absence will cause the ECU to run in a mode that will effect mileage. Make sense?

 

i have a 1996 gsr motor, i cant seem to find the 02 sensor on the header, but i know i need one on the cat

 

What year is the car, are you running obd1 or 2. If one you only need 1 o2. If your running obd2 u need 2. I know my b16 has one on the b pipe of the header and another one on the cat.

 

my car is a 98

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid93Eg &raquo;</TD></TR><TR><TD CLASS="quote">

More correctly stated...

OBD-1 has 1 O2 sensor...
OBD-2 has 2 O2 sensors...

so, depending on the year and setup of your engine, it could have one or two. The secondary O2 will not effect mileage if it is bad... The CEL however that is produced by its failure/absence will cause the ECU to run in a mode that will effect mileage. Make sense?
</TD></TR></TABLE>
correct except for one thing... it's the ECU that matters.
if your ECU is OBD2 (~96+) then it needs two O2s, if it's OBD1 (pre 96) then it needs one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Relic1 &raquo;</TD></TR><TR><TD CLASS="quote">
correct except for one thing... it's the ECU that matters.
if your ECU is OBD2 (~96+) then it needs two O2s, if it's OBD1 (pre 96) then it needs one.</TD></TR></TABLE>

Which is why you will see in my reply I used the term "so, depending on the year and setup of your engine" ...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid93Eg &raquo;</TD></TR><TR><TD CLASS="quote">

Which is why you will see in my reply I used the term "so, depending on the year and setup of your engine" ... </TD></TR></TABLE>
mmmm, you are right. It was too early in the morning for me to read.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Relic1 &raquo;</TD></TR><TR><TD CLASS="quote">mmmm, you are right. It was too early in the morning for me to read. </TD></TR></TABLE>

yep