I am going to be replacing my O2 sensors. And have some questions. I will be replacing them for maintenance purposes. There is just over 120k on the stock ones. Is it necessary to replace the downstreams? And which brand is the way to go Bosch or Motorcraft?

 

I'd help you out, but I'm not going to.


Hope this helps.

 

^This guys awesome hahaha. And I've heard Motorcraft are the best to use. I'll let someone else chime in though, I can't remember why hahaha

 

Usually Motorcrafts are Bosch.
Sometimes NTK.
Aftermarket Bosch should be the same without the Ford part number and with the same connectors.
If you were to look at them operating live with a Scanner and not see a problem or acting 'lazy', there ok to leave in place.
Usually the down streams are never changed unless there is a code set specifically telling they are in trouble such as an open heater etc.
Good luck.

 

Im glad you didn't help out since you dont know what your talking about anyway.

And thank you Bluegrass your always very helpful.

 

as bluegrass said, motorcraft is the best. im doing some el cheapo in my 90... ill let ya know how that goes...

 

Make sure you get Motorcraft sensors and you should only need to change the up stream(Front). The fronts are the "working" sensors and the rear only tells the computer if you have cats or not. So i would only replace the front ones.

Wayne

 

I just did my upstream sensors on my 4.2 in December. Had 310,000 km on them. Used Bosch aftermarket sensors from Napa. I had a challenging time removing the drivers side sensor as it is difficult to get at. Ended up cutting the body of the sensor off then using a 22mm 6-point socket on the sensor nut. When I tried using a sensor socket or a 12-point, they just rounded off the nut. Helped to warm the truck up to 190 then smack the nut before using a breaker bar. I went through the wheel well for better access and more leverage.

 

*you're.
I am sorry, I honestly am. I am trying to become a better poster.
Sometimes we all make mistakes. I hope you can forgive me, as I am still learning my way around forums.
I hope to someday be posting at the level of greats such as yourself.

How does it feel?

 

Thanks for the tips. Mine will be easy to get at since my fenders are empty from my lift. But how are the bosch's working out for you? did you notice any mpg increase? Smoother idle etc?

Im sorry i didn't know this was a spelling B. I will take my time and proof read my posts from now on. You need to reflect on the way you have been acting recently. It needs to stop. Your being ridiculous.

 

That's hilarious!

I guess it's as they say... payback is a b*tch lol