ok so i got a ls swap in my ef. now i also have 2 ecus.
one is a pr4 (obd0 LS) ecu re-manufactured, and the other is the stock si ecu(non vtec)


on the SI ecu i get one code. and thats a one for the 02 sensor.(with zc injectors)


and on the LS ecu i get the 1, and a 43. i ALSO have zc injectors supplying fuel.

now the stock motor, and the SI ecu on the LS only had the (1) so im assuming its NOT the pump, or filter.


i think its the injectors or the o2 sensor(for the 43)
(and i know 1 is the o2 sensor)

can some one point me in the right direction for the 43


THANKS

 

code 43 have to do with 02 sensor?
i dont get why it dont throw on the stock Si ecu?

 

yes 43 = bad wiring to the o2 or bad sensor.

 

anyone else

whys it do it on the ls ecuS...?

not the sohc?

 

Double check your O2 wiring, if it checks out put a new sensor in it.

 

thanks guys will do then post agian

 

Without looking I am pretty sure that the code 43 is fuel supply system code. I got this code myself on my LS swapped rex. When I went to get my exhaust fixed I noticed that I had a hole in my header right in front of my o2 port. I had the exhaust guy weld it up untill I can get me a new header and since then the code has been gone! Hope this helps.

 

so with your current setup is it just your o2 code comin up or your fuel codes still... if fuel codes grab up some stock ls injectors if everything else is stock

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by harmonator84 &raquo;</TD></TR><TR><TD CLASS="quote">Without looking I am pretty sure that the code 43 is fuel supply system code. I got this code myself on my LS swapped rex. When I went to get my exhaust fixed I noticed that I had a hole in my header right in front of my o2 port. I had the exhaust guy weld it up untill I can get me a new header and since then the code has been gone! Hope this helps.</TD></TR></TABLE>
ya well the header on the ls is ok and so was the sohc one aswell

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmed3 &raquo;</TD></TR><TR><TD CLASS="quote">so with your current setup is it just your o2 code comin up or your fuel codes still... if fuel codes grab up some stock ls injectors if everything else is stock</TD></TR></TABLE>

will replace o2 sensor, and swoop on these at the junkyard