they are the only sensor that wares out, 100kmi or 10yrs. and if they dont work right it throws the PCM off because of false readings

 

I just checked mine the numbers seem to be about the same.

 

I went out again this is the o2 sensors warmed up and I also scalled it out for more detail. I don't remember if I said I have a small shake at idle. I thought power balance didn't show up but looking at the screenshot of it on my phone, you can definitely see she's not running perfect except on cylinder 6. And it's only allowing one picture again...

 

 

And the power balance

 

bank 2 sensor 1 is working right. I'd replace both. use Bosh I think that will solve your issue got that from Amazon

BOSCH 15664 Premium Original Equipment Oxygen Sensor - Compatible with Select Ford Expedition, Explorer, E-350, E-450, Freestar, F-150, Ranger;

 

Alright, I'll order O2 sensors and install them. I'll post the results after they're installed. A few questions, Is it worth getting the down stream sensor too? And I'm guessing I should reset the keep alive memory after?

 

that on is just for the catalytic converter and has nothing to do with the motor. it just tells ya if its working.

 

I think the passenger side is not too bad. I cut a hole in the drivers side plastic fender well cover to make it easier to that one.

 

The fender cover is starting to come off on its on, so it should be hard to access them. In all honesty I didn't think anyone would answer on here. I'm hoping this will solve it, I've been at this for about a year. My uncle was leading me towards the trans, which yeah it should get rebuilt with it having 340,00 miles or whatever but for the most part it's still shifting good, it's a little slow with shifting from 1st to 2nd. So I was going to buy a new torque converter and a trans or rebuild it, but my gut is that I'll still have the same issue. If it's the trans why would it do it in natural? Thank you again, I still can't believe someone actually responded

 

I only respond to things I know about there are guys here that respond to stuff but they dont have a clue how some of this stuff works as far as the O2 sensors its a good call because at least you know they are good for 100k or 10yrs. they tell the PCM how the motor is running so if they aren't working right its bad info to the PCM. the PCM uses this info to adjust all the other sensors. hope it helps .

 

So I left to get lunch at work and it did its 35° at idle again, didn't happen for long. I also ordered the o2 sensors, they won't be here until the end of the week. I wanted to get everything but I didn't go long enough, meaning it fixed it self.

 

Scratch that, I was idling and I did it again (twice). I got 3 different scans saved, but oddly though half of it didn't get pulled at least on the first save. I post them later, I'm still at work until 5

 

Not sure why it didn't pull all the data, I don't have a issue in live data. I looked though it and didn't see anything except with the iac (#100 on the pdf), running happy it says "CTRL LEARN" and not happy it says "PREPOSITION". What does this preposition mean? Also o2 sensors looked the same as before

 

I think I'd wait till you get the O2 sensors. remember that dont start working until the motor is warmed up

 

I got the sensors and just swapped them, I didn't go on a drive yet but here is the old. Both look like this

 

I did clear the keep alive memory to get rid of the fuel trims. It's still a little shaky at idle but I'll see if it improves after more driving. It definitely has more power, and seems to be letting off. Meaning when I let off the throttle it starts to deaccelerate, I wish it was a little stronger on the engine braking but it's a lot better then it accelerating. Thank you again. I did notice on the maf without engine running it says .16 grams (I have to check again) not sure if that's the scanner or sensor. If I get time I'll try unplugging it and seeing what it says. Thank you again

 

For anyone else that's stumbling down this rabbit hole, at least on the 3L it wasn't hard at all to change the o2 sensors. I was kind of afraid that it wouldn't be accessible or at least it would be a pain to get too, but I got it from going through the wheel well to crack it loose and unscrewed it from above. Took me about 30 minutes

 

good job, yeah not too hard. make sure you put antiseze on the new ones.

 

I bought new motorcraft sensors from rockauto, they came with something on them. I haven't looked at engine data since I swapped the O2 sensors, I haven't needed to. So thank you again, I'm not fighting the engine anymore and instead it's been helping. We got a bit of snow, so I've been using the engine breaking (turning off over drive) and it's been working like a charm. I don't remember if I said this above but out of desperation I've tried limiting the iac, so it can't give it a lot of air in hopes it would help. It didn't, but I put the unmodified iac back in and I've been driving with that for a few days and still no issues. Again thank you. Also idle has gotten better, so over all the engine is happy. Oh and I'm kinda confused about how the computer controls the torque converter clutch, I put a heavy old washing machine in the bed to weigh the truck down in the snow, so I had some weight in it. I was driving down a road with cruise control set to about 40 or 50 mph and had to go over a steep bridge, I let cruise control deal with it but it didn't go well. Torque converter clutch was obviously locked and when I started to climb, the truck started to decline in speed and felt like it needed to down shift but instead it held the clutch hard. The clutch started to slip (made a good vibration or grinding if you will), I turned off cruise control and gave her some beans and went up without issue. I thought it would've been smart enough to realize that it should've turn it off, I know the clutch is based off of the throttle but is that it? I don't mean to sound like I was afraid of accidentally blowing up the transmission, that was the only time it did that. I'm curious if there's any other ways it knows when to disable the clutch, or does it hold it until you really move the throttle? Again thank you, I feel more comfortable fixing up the truck now.