quick o2 question
quick o2 question Me and my friend are arguing about 02's. since my car has a misfire and it might be 02's. I say the only 02 sensor that can cause a misfire is the one BEFORE the cat, he says either one could cause a misfire because they work together... Whos right?
well just in the morning or whenever before the car warms up does it miss? the car always starts in open loop then the o2's and other parameters have to reach their mark for it to switch into closed loop. which is where it then feeds off the o2 sensors and sends fuel corrections.
so when you start your car up does it miss automatically? if so its not the o2's
so when you start your car up does it miss automatically? if so its not the o2's
Launching!
Joined: Jun 2008
Posts: 242
Likes: 0
From: Glen Rock, PA
I don't know if it helps but I've never had misfire problems with not running the O2's or while having a bad one. I have both disconnected now and runs smooth with a 1-2mpg drop in mileage. If the O2 is bad, the check engine light will come on after the sensor can't reach it's neccesary voltage. From my TA and other cars, misfires are gonna be caused from plugs or elsewhere. The stock computer fuel mapping isn't crazy rich to cause the plugs to miss like that.
Last edited by OneBadTA; Jan 29, 2010 at 06:13 PM.
