I recently had a b18c JDM GSR motor installed in my 1990 honda civic SI. The swap was done almost flawlessly but I am now getting a check engine light. I believe the ECU is a P72 (OBD-1) And when i cross the two wires for diagnostics I am getting a code 43.

First question, Will code 43 cause my engine to run poorly or in "limp mode"

Second question, Does ANYONE have any suggestions or things to try to fix this.

(was considering replacing O2 Sensor)

Thank you all very much for your time.

 

wow, nobody?

 

o2 sensor. and yup my car ran limp. lol. Don't buy bosch. ntk, denso, or oem(ntk i think)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4potnick &raquo;</TD></TR><TR><TD CLASS="quote">o2 sensor. and yup my car ran limp. lol. Don't buy bosch. ntk, denso, or oem(ntk i think)</TD></TR></TABLE>

Thats not even the right code

Code 43
92-95 Civic
90-95 Prelude
94- up Integra

Fuel Supply System defective or malfunctioning fuel supply system

 

Ok so if its not the O2 sensor, does anyone have any suggestions on how to diagnose/fix the problem ?

I know its a technical question but any help would be GREATLY appreciated.

 

The service manual will have you check fuel pressure and the o2 sensor. Most of the time when I have diag'd this code it was an o2 related problem. Is there are harness converter for obd0-obd1 involved? Is the o2 sensor a 4 wire?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90blackcrx &raquo;</TD></TR><TR><TD CLASS="quote">Thats not even the right code

Code 43
92-95 Civic
90-95 Prelude
94- up Integra

Fuel Supply System defective or malfunctioning fuel supply system </TD></TR></TABLE>so you have dealt with this problem? apparently not cause 9 outs 10 times it's the o2 sensor. Search and you shall see. Don't just assume things cause you think they sound correct. mine have been from crappy bosch sensors

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cory man &raquo;</TD></TR><TR><TD CLASS="quote">The service manual will have you check fuel pressure and the o2 sensor. Most of the time when I have diag'd this code it was an o2 related problem. I</TD></TR></TABLE>Hery someone else who has actually dealt with this.

 

There is a rywire conversion harness being used, it IS a four wire O2 sensor. I just pulled another O2 sensor off a 95 civic at the scrap yard so im gonna swap em out and see if it makes a difference. Any other advice would still be appreciated, thnx for all the help so far.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4potnick &raquo;</TD></TR><TR><TD CLASS="quote">so you have dealt with this problem? apparently not cause 9 outs 10 times it's the o2 sensor.</TD></TR></TABLE>

Yeah I have, and I have followed the steps that Honda once payed me to do. You follow the manual and diagnose the problem.

9 times out of 10 is not 100% , I'm just stating what the code is.

 

one time a clogged fuel line gave me a code 43