faultu o2 sensor is it bad?

[peter535]

can a faulty front 02 sensor be bad for the engine?

 

[timot]

depends on which o2 sensor it is, the second one after the cat - no, the first one on the o2 housing - yes

 

[peter535]

yes my front one is bad so what can i expect if i continue to drive it

 

[crimsondragon]

your mpg will suck hardcore. it'll be a noticeable drop. maybe run a little richer than normal. that's one of the current problems on my car. i ordered a new sensor and it should be coming in soon.

 

[peter535]

im runnning crazy rich at idle its 10.7 afr how did u find out it was your o2 sensor?

 

[crimsondragon]

i brought my car to satan and they diagnosed it for free. told me the sensor had antifreeze poisoning from when i blew my head gasket.

 

[peter535]

So whats the worts thing that can happen if i have a faulty front o2 sensor,should i be drivng the car like this??

 

[98mitsuGSX-SD]

The bad thing with running a car with no o2 sensor is the fact you'll never enter a closed loop mode. the car will measure A/F ratio by guessing what the car needs by airflow from the MAS and fuel pressure. Your more than likely gonna get real bad gas mileage and your cat will slowly get clogged with gunk cutting it's effiecincy and possibly setting off your rear o2 sensor. I'd suggest replace it quickly and get a wideband. For the extra cost it's worth it, you'll be able to use the narrowband read out for day to day driving and use the wideband for tuning.

 

[peter535]

I dont have a cat and i have a wideband

 

[98mitsuGSX-SD]

Are you using the widebands narrowband output to the ECU? If not your wideband controller should have an output that you can hook up to your ECU and use the wideband for monitoring a/f ratios during closed loop operation. If your wideband is the o2 sensor that's faulty is it located in the right position roughly 16 inches from the turbo at 10-2 o'clock?

 

[peter535]

I got it installed at the shop but i beleave its located on the downpipe