hey guys. im not sure if this is the right spot for this but here it go's

i have the rear o2 removed and all patched up. never had an issue.

just recently my front o2 went bad ''so im told'' p0134 code. so i replaced it. the old one had 65k on it. no race gas. just pump. the new one has 1k miles on it and since it has been in i keep getting the same p0134 code for front o2. the o2 i got from oxygensensors.com. it is PNP so no cutting was needed. any idea's what my problem could be?? nothing looks wrong at all. its a custom DP and the sensor is like 5 inches from the exhaust turbine wheel. ''same distance as if it was in the stock o2 housing''

the car is now on SD and its going nuts as at cruising im in the 11s and 12s afr and when im on deceleration and then gas it i get a huge rich spike 9.9 to high 10s. im not sure if its in relation to the front o2 but i have to start somewhere. thanks

 

I am going through the same thing right now. Driving me crazy. Someone please help. I just can't believe I have not been able to find something on the forum to solve this issue.

 

bump

 

ok. i just noticed non of my fuel trim ''low mid high LTFT'' is logging and neither is my Oxygen feedback trim STFT.

any one???

 

dident think it would matter but all fuses and crap where just checked. nothing was wrong. anyone have an idea or where to look?

 

O2 CEL disable periphery bit also disables feedback. See the recent post about not having any LTFT.

 

o ok so its rom issue and not a wiring issue or mechanical problem? because i just yanked the hole engine harness out to inspect it. AWESOME.

 

my front o2 on ecuflash is set to 1 my rear is 0. im not really understanding what you are saying.

 

ok. i got the o2 to work. i dont know what its reading but at least now in evoscan the numbers are moving. as for the fuel trims low mid high. they are still at 0.1008 and do nothing.

oddly now my idle is 2000.2200 rpm.

all i did was enable rear o2 from 0 to 1 and took it out of open loop bit 4 0 to 1.

 

I get a reading on all of mine but my O2 sensor reads a continuous .8-.9 volts. Pulled some logs with my old one before it went bad and it was back and forth between .01-.9 volts while idling.

 

well i have no clue whats going on right now.

when the front o2 was not working i had .9v or so

when it it working the v is all over.

anyone car to look at these logs?? i cant figure out why the car is idling at 2k+ rpm now either.

 

That was the bit I was talking about... congratulations. Now it will take a while for your LTFTs to change because they are LONG TERM fuel trims.


So while it was not working the voltage output did not change, and now it is acting properly as a narrowband sensor? I'm failing to see any problem here....

 

thanks for your help. yes everything seems to be ok with the o2 and such. maybe i can email you a log of before and after to confirm it?

as for the idle i dont know. the car sits at 2k to 2200 rpm. and just hangs there. i dont know why or what to look for.

 

anyone with any more pointers

 

you ever get this issue fixed??????