my car runs really rough from idle on.

 

yes it can, first hand experiance here.


I had a problem with interference on the o2 signal wire, I had tapped in that for an A/F guage and it was causing problems such as stumbling and backfiring. Once I fixed that it was better.

Most of the time though, if an o2 sensor is bad it will throw a code. Sometimes, it won't.

Brian

 

Agree with above.. I diagnosed a firebird that was running awfully, bucking, smelling, etc.. hooked it up to my laptop and it showed one O2 stuck at a high reading, no trouble codes. After the O2 was replaced it ran like a new car..

 

My o2 sensors are causing me to have split blms and making the car run very rich.

But on yours, the o2s moniter the air/fuel ratio when the car has warmed up and is runnin in closed loop. If one isnt working right, it wont give the comp the correct a/f ratio and it will run terrible.

Good luck
James

 

absolutely can make it run bad, I also had a bait of issues with the drivers side 02, Denso (think it's called) makes a nice 02 compared to Bosch (went through 4 sets) couple years back. Autozone will scan for free and tell you the code.

 

don't buy bosch?

 

Buy the stock gm replacments...i have also heard bad things about bosch.

 

Yes it can.