ok so i am in class today and we are talking about scan tools and lab scopes.....wel to make day long story short i pluged the ASAIN SNAPON SCAN TOOL.....and ohut ohh... CODES, codes and more codes.

well only two of them came back after i cleared them. i have a code 01 O2 sensor singnal voltage high, and CODE 43 fuel system always LEAN...know what i haved learned in class is that the o2 sensor when having high voltage, it tellin the injector to ad more fuel and veise versa, COMMAND CONTROLS CONDITION. then if my voltage is high i should be rich not lean...so after using shop key and alldata, and having no luck with the DTC "tree"...i am turning to the honda tech tech head for answers.....

problems i have been having is a intermitent stuble (CAR FALLS ON FACE) right around 3300-3500 and only at half throttle......i thought it was tps or map sensors so after "changing" the sensors (AKA i swaped my ls to my b16) I OUT RULED all sensors...minus the o2.... so i know iknow "change the o2 " well i have two to choose from...but its not right the reading on the LAB SCope read normal and i am getting the norm of sweep counts reading between the 756mV and 136mV with an avrage of 345mV wich is a lil low from the norm of 450mV...so with that said i believ its not an o2 issue...so wTF is it...??? fuel pump? that might be the next fix ...but after prefoirming a fuel pressure test and full output of the fuel pump it in the norm, i got 35psi and about 57psi when i clamped the return line....

<U>INFO ON MY CAR.....</U>
1995 civic VX
B16 swap
stock fuel pump
chipped p28

or
LS swap '
p75

problem ocured with both enignes

 

1 is bad O2 sensor. Replace.

43 is caused by 1 and may be remedied if 1 is solved.

Also think about changing your fuel filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by badboypolar2 &raquo;</TD></TR><TR><TD CLASS="quote">1 is bad O2 sensor. Replace.

43 is caused by 1 and may be remedied if 1 is solved.

Also think about changing your fuel filter.</TD></TR></TABLE>
o2 sensor is good i tested it.......on a lab scope.so ya

 

Did you drive at 3300-3500rpm with the lab scope hooked up? Point is, it may be reading ok when you have it hooked up but be way off during real conditions. I have been burned so many times on sensors that test good...but really arent. You have come this far, why not change it... I bet you it fixes the problem. http://www.rywire.com has nice denso 4 wire o2 sensors in stock.