Quote from: kskrew4life on July 28, 2015, 02:55:15 PM
Im using the SCT x4 device with the liveLink Gen-II. Torrie said both sensors in the log were not responding correctly, I have no idea what is going on

Please post the log in native csv format and I ill look at it in Livelink

Should I be saving it as datalog or as datalog view? Also I've tried to upload a log file save as datalog the size is 13mb so for some reason I can't upload it directly to this forum so I have to zip it.

as long as all the info is in view on the screen its ok to do that. if you want to have complete thing its all.

Quote from: kskrew4life on July 29, 2015, 12:25:18 AM
Should I be saving it as datalog or as datalog view? Also I've tried to upload a log file save as datalog the size is 13mb so for some reason I can't upload it directly to this forum so I have to zip it.

attached zip file of last log

Does look the rear O2 sensor on bank 2 is lazy/slow to respond during WOT (based on measured AFR differences btwn banks).  Could also be a split pipe (near the clamp) or a loose clamp on the turbo piping.

Quote from: SHOdded on July 29, 2015, 06:23:44 AM
Does look the rear O2 sensor on bank 2 is lazy/slow to respond during WOT (based on measured AFR differences btwn banks).  Could also be a split pipe (near the clamp) or a loose clamp on the turbo piping.

Where would i find that split pipe / turbo piping? im assuming it would be under the engine cover

Taking the engine cover off makes it easier to see everything.  Follow the hoses coming out of/going into the intercooler for starters.  There are good pics in BiGMaC's writeup re:  hard hotpipes installation, found here:
http://www.ecoboostperformanceforum.com/index.php/topic,2248.msg32460.html#msg32460

Quote from: kskrew4life on July 29, 2015, 09:08:59 AM

Quote from: SHOdded on July 29, 2015, 06:23:44 AM
Does look the rear O2 sensor on bank 2 is lazy/slow to respond during WOT (based on measured AFR differences btwn banks).  Could also be a split pipe (near the clamp) or a loose clamp on the turbo piping.

Where would i find that split pipe / turbo piping? im assuming it would be under the engine cover

2 most likely spots...where they connect to the turbos

Rich

I would also mention a slow 02 sensor could be impacted by excessive purge vapors,probably also need to check anything afiliated in that department as well.  Z

Thanks Guys for all the responses, i have attached another log i captured today. I was looking at the data in live link program ..i notice every time WOT is initiated the AFR lambda readings react up until a certain point.. then both will stop at random values after the rpm gets high.. its as if the system switches to open loop and the o2 sensors are ignored. then both will reset to 2.00 and start reading normally again with regular driving... has Anyone else noticed this in their logs?

It doesn't matter if u are open loop or not...I'll try to post more tonight if I can find time...I looked at 1 of ur logs...ur readings and problem to me seems to be much more than any exhaust leak....it appears u have malfunctioning hardware.

It looks like both primary O2 sensors a bad but that's kind of hard to believe...even when ur o2s are reading they are swinging in large increments....I would try changing them...sorry I forget if u said u had down pipes installed...also ur vehicle looks a few years old from the pic...is that correct?

These cars use 02 feedback even in open loop..which is kind of a contradiction to what open loop means lol...when I looked at ur logs I thought it would be obvious that one was not reading but they both acted similar.....and I also noticed like u did that at a certain point the just flatlined and stopped reading....that tells me they are shot..

I've seen this before..while at wot when the O2 sensors get hot and in the presence of rich fuel mixtures they will display lean the just stop reading until wot has ended

Quote from: kskrew4life on July 27, 2015, 12:55:56 AM

Quote from: SHOdded on July 26, 2015, 11:41:10 PM
I do see some fuel pressure dropout during WOT, happened twice during the 2 extended WOT sessions, datapoints 16,000 and 25,800 or so.  From 15 at max to around 12 at lowest during WOT.

Interesting the battery voltage never goes above 14V.

hmmm thanks for pointing that out.. It seems the injectors has the capacity to flow more than the fuel pump can maintain..... probably would cause me to run lean , higher combustion temperature or heat soak. perhaps there is too much boost with this tune. i saw a max of 19 psi... what are others seeing?

U are nowhere near being at too much boost

Fuel injectors don't flow more than a fuel pump can deliver....all the injector does is pulse...some deliver more or less fuel per pulse than other injectors at given pressure

Quote from: ajpturbo on July 29, 2015, 02:04:49 PM
It doesn't matter if u are open loop or not...I'll try to post more tonight if I can find time...I looked at 1 of ur logs...ur readings and problem to me seems to be much more than any exhaust leak....it appears u have malfunctioning hardware.

It looks like both primary O2 sensors a bad but that's kind of hard to believe...even when ur o2s are reading they are swinging in large increments....I would try changing them...sorry I forget if u said u had down pipes installed...also ur vehicle looks a few years old from the pic...is that correct?

Hey thanks for the response. No down pipes installed, the car is stock, only thing changed was the original filter to a K&N drop in performance filter and the now unleashed 93 octane 3bar tune (which was recently reverted back to stock)  This a 2010 with 65k miles, yes its a few years old

Quote from: ajpturbo on July 29, 2015, 02:15:01 PM
These cars use 02 feedback even in open loop..which is kind of a contradiction to what open loop means lol...when I looked at ur logs I thought it would be obvious that one was not reading but they both acted similar.....and I also noticed like u did that at a certain point the just flatlined and stopped reading....that tells me they are shot..

I've seen this before..while at wot when the O2 sensors get hot and in the presence of rich fuel mixtures they will display lean the just stop reading until wot has ended

hmm interesting .. uses o2 feedback even in open loop, that i did not know or would even consider. if they flat lined like that .. shouldn't there be some fault codes of some sort?