90WhiteVrt

With the O2 sensor hooked up the car jerks and hesitates. W/o the O2, the car runs smooth. Weird right? Another thing i noticed is that the car will hesitate even when it's stone cold w/ the o2 connected, which puzzles me because i thought the O2 didnt even work until it was heated up? Any ideas? Thanks in advance.
Paul

LookThatsMe

just get rid of it and run a A/f guage... thats what everyone doesnt anyway lol... the way i see it the only good thing the O2 does it prevents codes from coming up and check engine light on your stock ecu

poor_red_neck

Have you tested the output voltage to see if the actual sensor is bad? You can use a generic 15 dollar single wire 02 sensor. Matter of fact, I still have an extra one you can have for 10 bucks, never installed. I'm off gorman street in raleigh (not trying to make a sale here, just offering local help)

mort2002

iTrader: (1)

ok for 1 the O2 sesnsor does more than prevent codes and check engine light... if you listen to this guy your car will NEVER go into closed loop AFR and you will always run rich, and you will lose MPG. guarateed. when the O2 is working proper, and you are cruising, as soon as you hit -10 vaccume your car goes into closed loop holing your AFR at 14.7... with out the O2 it WONT do that..

SpooledupRacing

we dont have to have a 02 sensor in our car? on a 13b n/t 5spd the car will run just fine with it unplugged and not running?

wont it cause our cars to run bad in the cold or to be super lean or super rich?

TitosToy

a properly working o2 sensor tells the computer how much air and fuel is being burned and the computer adjusts the a/f ratio to make it run stoich. w/o the sensor it makes the computer run it rich - so the answer to your question is yes you can run the car w/o the sensor but it will run rich. sounds like to me that the o2 sensor is not working properly (sending bad signals, not enough voltage - i dunno) have you tried putting a new sensor to see if it does the same thing?

um - dont you need a 02 sensor to use the a/f gauge (narrow or wideband) to make the gauge work? cuz i have one and it worked fine til my sensor crapped out and all it does is light up dead lean.

SpooledupRacing

I think he ment buying a wideband with its sensor and use that instead of one wired to the stock wire harness..

and yea running rich is not a good thing the richer u are the less power u make.. I want to be as close to stoich as possible..

so I will be leaving mine in

poor_red_neck

Um no, you cannot use a wideband "in place" of your stock O2 sensor.
Your O2 sensor is on a 1 volt range, widebands are on a 5V scale. I'm sure stand alone ECUs can operate with one, I'm not sure... don't know that much about standalone. I'm pretty sure they don't use them at all, along with AFMs...