well i have a crx that i converted to obd1 every thing done works right.my question is that i have another crx that i wana switch it all over but my other crx has 2 o2 sensors and the othet crx thats obd1 now has only 1 o2 sensor.its a pr3 ecu that has the 2 o2 sensors.

 

do i just not hook one up?

 

you need a 4 wire o2 to be obd1 will not except 1 wire o2

 

yeah you need a four wire and you will need a manifold that has the O2 bung right before the cat to ensure proper readings

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oodie &raquo;</TD></TR><TR><TD CLASS="quote">you need a 4 wire o2 to be obd1 will not except 1 wire o2</TD></TR></TABLE>

Or you can use just one of your stock ones with a chipped obd1 map with o2 heater disabled

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oodie &raquo;</TD></TR><TR><TD CLASS="quote">you need a 4 wire o2 to be obd1 will not except 1 wire o2</TD></TR></TABLE>

thank u there capt. obvise ...did i not say i have obd1?i know i have to use a 4 wire heated o2 sensor my question is do i just not hook one up?

 

ttt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vw eater &raquo;</TD></TR><TR><TD CLASS="quote">thank u there capt. obvise ...did i not say i have obd1?i know i have to use a 4 wire heated o2 sensor my question is do i just not hook one up?</TD></TR></TABLE>

wow, if you are going to be such a dick to fellow members when they actually try to help you...then to you buddy.

btw its obvious

if you are going to stick with the old manifold with two o2 bungs...you have to plug those up and get an o2 bung welded at the end of the header by the cat and hook up your 4 wire sensor there.

if you change to an obd1 manifold, then just use the bung provided for the sensor.

either way, you have to get rid of the sensors you have now.