Incorrect AFR at WOT Help!!

[ZSHO]

I forgot to mention if you at anypoint disconnected the battery when you reverted back to stock tune?  Z

 

[kskrew4life]

I had a similar issue with my bank 2 sensor, then it quit working entirely since replacing it everything is fine again.

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Do you have the part number for that sensor?  I'm seeing front upstream sensor but some description specifies left and right front...

 

[kskrew4life]

I forgot to mention if you at anypoint disconnected the battery when you reverted back to stock tune?  Z

No I didn't disconnect the battery.. I drove it around till the DC was ready then got the logs

 

[ZSHO]

I believe the upstream left and right 02 sensors have the same part number,check out the reference below. Z      http://www.tascaparts.com/ford/taurus/8f9z9f472b/2010-year/sho-trim/3-5l-v6-gas-engine/emission-system-cat/emission-components-scat/?part_name=ft-oxygen-sensor&position=left  BTW you can always verify this with Torrie to make certain.  Z

 

[SHOdded]

2010 FORD TAURUS 3.5L V6 Turbocharged :
Emission : Oxygen Sensor    Price

NTK Part # 22009  Click for more information about this part
NTK OE Type
Downstream Right; NTK is Original Equipment
$24.79

NTK Part # 22500  Click for more information about this part
{#22109} NTK OE Type  One of our most popular parts
Downstream Left; NTK is Original Equipment
$27.79

MOTORCRAFT Part # DY1120  Click for more information about this part
{#8F9Z9F472B} Heated
Upper
$47.79

MOTORCRAFT Part # DY1056  Click for more information about this part
{#5F9Z9G444AB} Heated
Downstream
$57.79

NTK Part # 24348  Click for more information about this part
OE Type 5-Wire Wideband A/F Sensor
Upstream Right
Upstream Left
$118.79

 

[ajpturbo]

Torrie is not your parts guy lol.....get the motorcraft dy1120 that part is not normally $47..I saw that on rock auto they are plain packaged or something not sure what that means

 

[kskrew4life]

Can anyone explain this? this was taken from the last log i posted, i focused more on the TP and 02 and i think this is very interesting find.. this almost looks like witchcraft

 

[kskrew4life]

Torrie is not your parts guy lol.....get the motorcraft dy1120 that part is not normally $47..I saw that on rock auto they are plain packaged or something not sure what that means

lol he quoted me $135 a pop

 

[ZSHO]

Were you able to confirm the correct part # for assurance purposes.

 

[kskrew4life]

no, he asked for my VIN, then responded with the $135  quote

 

[SHOdded]

Get the Motorcraft sensors from RockAuto or EBay, don't have to worry about right/left that way.  Upstream has more functions, so it is more expensive (any brand).

If you really want Ford OEM, look for
8F9Z-9F472-B - UPSTREAM
AA5Z-9G444-A - DOWNSTREAM

 

[BiGMaC]

Can anyone explain this? this was taken from the last log i posted, i focused more on the TP and 02 and i think this is very interesting find.. this almost looks like witchcraft

What did you notice? Guess I don't see it. It looks like more air gets sucked in under brisk acelleration as expected and drop in AFR when the throttle is released.

 

[kskrew4life]

Can anyone explain this? this was taken from the last log i posted, i focused more on the TP and 02 and i think this is very interesting find.. this almost looks like witchcraft

What did you notice? Guess I don't see it. It looks like more air gets sucked in under brisk acelleration as expected and drop in AFR when the throttle is released.

if you look closely im actually not easing off the throttle .. the vehicle speed is increasing with the rpm band, but the TP just drops off for whatever reason.. if i eased off the throttle there would e a sudden drop in speed and Rpm as well

 

[ajpturbo]

U mean throttle angle?...yep that's normal...don't try to understand it....it does that to modulate delivered torque....just get your 02 sensors and go from there

 

[kskrew4life]

U mean throttle angle?...yep that's normal...don't try to understand it....it does that to modulate delivered torque....just get your 02 sensors and go from there

Should i be replacing all 4 sensors?

 

[ajpturbo]

No....from what I saw on the logs I would replace both upstream sensors...they can also be called primary o2 sensors

 

[kskrew4life]

alright so i got bank 2 sensor upstream replaced...even though it was in plain sight, it took a lot of effort (even for 2 people) to get that thing out. had to use a torch......... checkout the attached log for update.

 

[kskrew4life]

another log

 

[ajpturbo]

I like it....Measured afr in both bank were the same, STFT's were indentical between both banks. Knock sensor was at 0 and looked great...Definitely looks like it fixed it....You should try and do longer pulls though...When you can go WOT in the upper gears it slows the data down and I think you can see things more clearly.

You and I think brewer or curry have what appears to be the same thing going on with your 02's and I think you both have 2010 or 2011's....interesting

 

[kskrew4life]

Thanks for all the support, Torrie sent me a revision so i will try to get some longer WOT session log up.