no o2 volts

[Jt_4g63]

every time i start my 1g the o2 volts is 0.i let the car warm up the o2 still 0,only when i press the gas it starts to cycle up and down?????????/

 

[Blue Talon Boy]

How are you registering this? Logger or AFR meter?

What you probably have is a bad O2 sensor. I would start with replacing this and get back to me.

 

[black_gst]

O2 is bad

 

[Blue Talon Boy]

O2 is bad

That's what I'm banking on as well!!
You should be able to pick an OE one up from Advance for lees than $100.

 

[Jt_4g63]

i changed the o2 and still the same. my WB reads 16-17 and when i press the gas the WB read 14.7
it would't let me post the log file i have,i can send it.
and i have a next post about open loop leaning out any help???

setup: dsm link v3, fic 550cc, rewired stock fuel pump, 14b turbo, 2.5" intercooler piping, fmic 28x6x3, ssq bov, full 3" exhaust to N1, hack 1g maf, vac lines blocked off, stock block, stock head, auto 1g

 

[black_gst]

Are you logging you wideband in link? Also where you your wideband sensor located. Have you done the maf calibration? The hacked 1g maf lets more air through then what the maf can read thats why you are lean at idle... Does the car idle fine or does it try try to die?

 

[mcneilmg]

every time i start my 1g the o2 volts is 0.i let the car warm up the o2 still 0,only when i press the gas it starts to cycle up and down?????????/

I had the same problem with my 2g. I had a modis graphing the 02 along with backprobing the 02 with a Vantage double checking from the ecm and what was actually happening at the 02 and it was a bad upstream 02. I had 0 volts in closed loop. I had a code Fuel trim malfunction bank 1. THis ment that the ecm could not read anything from the 02. I replaced the 02 drove about 100 miles and the ecm erased the mil on its own. I hope this helped

I had the same problem with my 2g. I had a modis graphing the 02 along with backprobing the 02 with a Vantage double checking from the ecm and what was actually happening at the 02 and it was a bad upstream 02. I had 0 volts in closed loop. I had a code Fuel trim malfunction bank 1. THis ment that the ecm could not read anything from the 02. I replaced the 02 drove about 100 miles and the ecm erased the mil on its own. I hope this helped

oops didnt see the other responses my bad

 

[Jt_4g63]

yes am logging my wideband, my wideband is at the end of the downpipe, the car idle good, is the maf hack good?

 

[68442]

You sure you don't have a vacuum leak? My car was at 0v and I had to add fuel (adjust global) until it cycled again. I found I was missing a vacuum cap so I was sucking a bunch of unmetered air.