An 02 socket will make life easier at times, just depends on position. If you can swing a 12" long wrench and not hit anything, go for it.o, m

also, a coworker in Houston took his 40 foot 5'er to Black Hills, South Dakota and back for a 2 week vacation. He has a 6.7 powersuck and averaged 12.5 MPG for his whole trip.

 

i have a 2000 extended cab 4.7 4x4, 3.91's ac works, 217k. i only drive city, 5 miles each way to work. 14mpg. my lil ram has 4 o2's. ive been getting cat 1 efficiency codes for a while. Now my truck has be lightened significantly thanks to north east ohio winters.

 

Rust?

 

Don't be fooled by how easy those O2 sensors LOOK to get at. They'll somehow teleport your hand a foot over and guarantee a busted knuckle.

I've changed to more city driving and my MPG has tanked a bit. I used to averag 50/50 16-17MPG. Last fuel up was a grand 14.5... Ouch. '98 RC 3.9L auto. It is, however, due for an oil change, anyone wanna volunteer?

 

I just purchased a pair of Denso sensors last night on for roughly 24 bucks apiece (dealer quoted me $134 apiece for Mopar). Lets see if they have an effect on mileage.



I've federal got emissions, same sensor for upstream and down. At 50 bucks for the pair, I can swallow the loss if there is absolutely no difference in mileage. They're so cheap that I wondered if they were knockoffs, but when I looked them up on the Denso website, some of their recommended sellers were also selling them for that price, while some had em for double.

For future reference in case someone is looking...

https://densoautoparts.com/find-my-p...#ProductDetail (Click cross ref and type in your Mopar part # below)

My Mopar part number (dealer ran my VIN) = 56028765AA
Denso cross referenced part = 234-4718

 

Denso makes a pretty good sensor, it's one of my go-to brands. They're OEM for Toyota, which is where I started using them. Used to have a 2006 Corolla for a work beater until my knee couldn't handle the stick anymore and I had to get an auto. Now have a 2008 Colorado for a beater.

 

Sensors got here pretty quick. Now to build up the will power to get the job done and not have them sitting on the shelf for months. I don't relish getting under the truck these days and Skreelink is right, getting at least one of them unplugged is going to be a knuckle buster.

 

Yeah, I really don't know what the engineers were thinkin' with the locations of some of those connectors..... (aside from maybe... "Take that you idiots!! Good luck with that one.") I am firmly convinced that engineers/designers HATE technicians.

 

Yea, the downstream is likely on top of the transmission.

 

After years and years of working on GM stuff I'm fully convinced GM has a department whose sole function in life is to make life harder on mechanics. I swear it's the only way to explain why stuff that could be put anywhere is put in the one place that it almost but won't quite come off without spending an hour removing several unrelated items. I wouldn't be a bit surprised if all three automakers had the same engineering thoughts on this. After all, they're all in Detroit, you know they all get together for beers on the weekend and talk shop, and when they job hop they're all right there in the same place.