I have a p28 ecu and I'm putting in a test pipe that has no o2 bung. Will I need it even though I'm OBD1??? Or can I just tie the sensor up somewhere?

 

yes, you need an o2. just have an exhaust shop tap it in before the test pipe.

 

Yes, you need to have a bung welded in.

 

if you are talking about the post cat o2 you do not need it on a p28. but you will still need the primary o2 before the cat.

 

well my car only has one sensor that I know of. It is located in the cat itself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zseeanz &raquo;</TD></TR><TR><TD CLASS="quote">well my car only has one sensor that I know of. It is located in the cat itself.</TD></TR></TABLE>

obd1 is one sensor, obd2 is 2. you can move the primary o2 up before the test pipe.

 

I'm sorry, car was OBD2 and converted to OBD1...... The only sensor I know about is in the cat. Is there one somewhere else?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zseeanz &raquo;</TD></TR><TR><TD CLASS="quote">I'm sorry, car was OBD2 and converted to OBD1...... The only sensor I know about is in the cat. Is there one somewhere else?</TD></TR></TABLE>

on obd2 cars, they are usually about 15" or so apart. both are close to the cat.

 

so I need the pre cat one, not the on actually in the cat?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zseeanz &raquo;</TD></TR><TR><TD CLASS="quote">so I need the pre cat one, not the on actually in the cat?</TD></TR></TABLE>

it doesn't really matter with a test pipe, as long as you have one.

 

Can I just zip tie one out of the way???

 

an obd1 ecu only reads one, so you only need one. but the one o2 you have needs to be reading the exhaust gasses. it adjusts your a/f ratio as you drive. you would run incredibly rich if you just zip tied it up, and it would throw a cel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zseeanz &raquo;</TD></TR><TR><TD CLASS="quote">Can I just zip tie one out of the way???</TD></TR></TABLE>

Your car has (2) o2 sensors.
(1) is before the catalytic.
(1) is on the catalytic.

You are going to OBD1.
You only need the (1) before the catalytic.
Whatever you do with the other one is up to you, buddy.

Done.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zseeanz &raquo;</TD></TR><TR><TD CLASS="quote">well my car only has one sensor that I know of. It is located in the cat itself.</TD></TR></TABLE>

If it's OBD1, it should be on the exhaust manifold, as far as I know.

 

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

Your car has (2) o2 sensors.
(1) is before the catalytic.
(1) is on the catalytic.

You are going to OBD1.
You only need the (1) before the catalytic.
Whatever you do with the other one is up to you, buddy.

Done.</TD></TR></TABLE>

Thanks man