Is my 02 Sensor bad? I have no idea what the numbers should be. I checked for vacume leaks today. I'm trying to fix every little thing wrong with this car.

Thanks,
Andrew

is the first at wot? if so thats normal.

what throttle percent was the second reading of 777 mV?

I never went farther than 3/4 throttle when reving. One of my concerns is the 02 crosscounts. That seems low.

when i was / (and still am) dealing with havin the mem-cal programed in the project in my sig. the guy programming said the the o2 voltage should be 900-950 @ wot. if ur only 75% then i would think thats a lil rich.

he also said it is a more accurate reading to check when the engine is under load. do you have some one to ride shotty while u drive. i had my lil brother come over to watch the readings.

(ohh and i have that exact same scanner. not bad for 200 bucks.)

How old is it?


Mine looked like that and then I posted a question about cross counts. The responder said the counts should be greater meaning O2 sensor is tired.

I changed O2 sensor and have gotten better performance and gas mileage.

http://www.bonnevilleclub.com/forum/...ic.php?t=83359

If someone can record while driving, you'll get better readings.