My car has faulty 02 sensors, and a misfire in 4th gear, could these be related?

 

Maybe the car is running lean and blowing the spark out...?...?

 

What do you reckon?

 

cheers guys

very much doubt it, you could unplug the o2 sensors and they car wouldn't miss fire, most likely be a sparkplug or connector on coil pack or injector connector, also ptu connection

rich

No

I would try pressing all the coil packs down to make sure one hasn't come loose. I had this problem. Thought I was going to have a nightmare and it was just a loose pack.

Agreed, not an O2 sensor problem. I would focus on ignition circuit issues as mentioned above.

Had my car 3 years now and it,s never had O2 sensors in it and runs perfect !!!!

It doesn't run perfect, the zeds swallow a lot more juice when no o2 sensors aren't attached!

Had my car 3 years now and it,s never had O2 sensors in it and runs perfect !!!!

 

You Really mean that ? None at all ? Blanked off ?

 

It certainly will run without as there is a default setting in the ECU for when they fail, but you will run rich pretty much all the time up to about 3500rpm I think.

I don,t get any excessive sooting of the exhaust and it,s de-catted and just sailed through it,s mot !!!!

I did actually fit a pair of after market ones , the running was the same but it just surged up and down on tickover and stalled :confused: unplugged them and it run as sweet as a nut , so left it at that :D

So you fitted a pair of non nissan O2 sensors, they caused hunting of the idle and you unplugged them and it appears to be running correctly now?