Data Logs! Post them here.

[Phantobe]

Originally Posted by steve99

Dont worry about stft it varies with heap of factors like load throttle temp ect, long term fuel trim is the one you watch its the average of stft over a sliding time window and the difference between commanded and actual afr. yours looks ok.

When your rolling downhill or to a stop the momentum of car is used to turn engine over and the ecu shuts off fueling to save fuel so you will see afr go to high values like 20.

Looks like you still have some knock arroind 3000 to 3400 loads 0.8 to 1.1 , probavly what knocking your iam down.

and some 4800-5200 loads around 1

Yeah I was mainly concerned with the open loop AFR being in the mid 13s on a WOT pull, I haven't seen that much. Its usually like ~12.5 or lower.

Was wondering if there could be an issue there.

[steve99]

Originally Posted by Phantobe

Yeah I was mainly concerned with the open loop AFR being in the mid 13s on a WOT pull, I haven't seen that much. Its usually like ~12.5 or lower.

Was wondering if there could be an issue there.

look at the difference between commanded afr and actual afr if it way different then ol maf scaling is off or you have leaks. the stage 2 tunes do run a but richer than stage 1.

[Phantobe]

Originally Posted by steve99

look at the difference between commanded afr and actual afr if it way different then ol maf scaling is off or you have leaks. the stage 2 tunes do run a but richer than stage 1.

I'll have to do more WOT pulls but it seems I'm running ~.50 leaner in some areas than the command AFR.

LTFT seems to be pretty stable... hmm...Shouldn't be any leaks as I double checked my torques on the install.

[Sovereign]

This is OFT tune.
Hey guys, I just flashed to UEL Stage 2 E85. Do these values look normal?? They are different than what I had with the EL stage 2 E85 tune. Especially the AFR and fuel trims. This log is recorded during the 90-100 mile number after flash.

My setup. MXP catless header + overpipe, berk high flow cat front pipe, q300 catback and E85. Also I never got a CEL light but if I check codes with OFT I get fault codes p015a and p015b.

http://www.datazap.me/u/dnuorgrednu2...5?log=0&data=1

Thanks.

[steve99]

Originally Posted by Sovereign

This is OFT tune.
Hey guys, I just flashed to UEL Stage 2 E85. Do these values look normal?? They are different than what I had with the EL stage 2 E85 tune. Especially the AFR and fuel trims. This log is recorded during the 90-100 mile number after flash.

My setup. MXP catless header + overpipe, berk high flow cat front pipe, q300 catback and E85. Also I never got a CEL light but if I check codes with OFT I get fault codes p015a and p015b.

http://www.datazap.me/u/dnuorgrednu2...5?log=0&data=1

Thanks.

cannot view log maybe its no set to public ??

Those codes indicate slow respomse of 02sensor to rich lean condition, maybe you have air leak in exhaust or problem with o2 sensor

[Sovereign]

Should be public. Try this http://www.datazap.me/u/dnuorgrednu2...5?log=0&data=1

Originally Posted by steve99

cannot view log maybe its no set to public ??

Those codes indicate slow respomse of 02sensor to rich lean condition, maybe you have air leak in exhaust or problem with o2 sensor

[steve99]

Originally Posted by Sovereign

Should be public. Try this http://www.datazap.me/u/dnuorgrednu2...5?log=0&data=1

Looks like something is wrong
you have high positive fuel trims up to 15%
that means ecu is adding fuel

if thats first tank of e85 then usually the residual petrol makes it run rich and you get negitive fuel trims

you usually only get hight positive trims on e85 if you e% is rearly high like over E85 for those level of positive trim.

air leak in exhaust will leak in fresh air and make o2 sensor think its lean so ecu adds fuel.
or o2 sensor is damaged

or your running a petrol tune with e85 in tank

[Sovereign]

I'm pretty sure the tune is a E85 tune. I'll check again. This is not my first e85 tank either so I guess I'll check for air leaks since this just started happening after the headers were installed. It doesn't sound like there is a leak in the exhaust though. I also topped off my e85 tank after about around 50miles after the flash to the UEL tune with 1/3 tank left but it is in the same place I always do it so it shouldn't be a problem or a very high mix.

Originally Posted by steve99

Looks like something is wrong
you have high positive fuel trims up to 15%
that means ecu is adding fuel

if thats first tank of e85 then usually the residual petrol makes it run rich and you get negitive fuel trims

you usually only get hight positive trims on e85 if you e% is rearly high like over E85 for those level of positive trim.

air leak in exhaust will leak in fresh air and make o2 sensor think its lean so ecu adds fuel.
or o2 sensor is damaged

or your running a petrol tune with e85 in tank

[steve99]

Originally Posted by Sovereign

I'm pretty sure the tune is a E85 tune. I'll check again. This is not my first e85 tank either so I guess I'll check for air leaks since this just started happening after the headers were installed. It doesn't sound like there is a leak in the exhaust though. I also topped off my e85 tank after about around 50miles after the flash to the UEL tune with 1/3 tank left but it is in the same place I always do it so it shouldn't be a problem or a very high mix.

ok if it only started after header install it does point to gasket leak at engine overpipe connection or at the 02sensors them selves.

new gaskets ?

did you run a thread tap chaser through the header o2 threads, if you had to force o2 sensors in it can damage the threads causing a leak.

check the sensors are pluged in correctly black to black and grey plug to grey socket.

[Sovereign]

Originally Posted by steve99

ok if it only started after header install it does point to gasket leak at engine overpipe connection or at the 02sensors them selves.

new gaskets ?

did you run a thread tap chaser through the header o2 threads, if you had to force o2 sensors in it can damage the threads causing a leak.

check the sensors are pluged in correctly black to black and grey plug to grey socket.

I did a visual inspection of the o2 sensors they seem to be tight and it doesn't look like there is a gasket leak from header to overpipe. I didn't do the install so idk if they forced the o2 sensors in or not though. I'm not able to get under my car atm so I'm not 100% if the gaskets or the left most o2 sensor is 100% if you're looking straight at your engine bay

[themajesticone]

Can anyone, maybe @steve99 give me a review/feedback of my mini run tonight? Just installed my Tomei UEL and OP. My full list of mods are in my signature below. I also have a HKS drop-in filter if that counts or needs to be known. I was running E85. It was 70 degrees out. I appreciate the help.

http://datazap.me/u/1086/tomei-uel-e85?log=0&data=1

[steve99]

Originally Posted by themajesticone

Can anyone, maybe @steve99 give me a review/feedback of my mini run tonight? Just installed my Tomei UEL and OP. My full list of mods are in my signature below. I also have a HKS drop-in filter if that counts or needs to be known. I was running E85. It was 70 degrees out. I appreciate the help.

http://datazap.me/u/1086/tomei-uel-e85?log=0&data=1

Is this your first tank of E85 ?? as fuel trims are -8 negitive usually happens when residual petrol causes rich running and ecu leans using fuel trims.

Their is also a bit of knock somewhere before log started as IAM starts at 0.85 and is climbing back towards 1.

it might just be fuel trims need a bit more learning and residual petrol causing that bit of knock.

If you log FLKC and Knock Correction (FBKC) instead of vvt intake and exhaust would help to see knock.

and log Commanded AFR and Engine load instead of oil/coolant temp.

try a

Vishnu Reset -Trick
Yes you can google it :-)

Basically it speed's learning of Fuel Trims and will Reset you IAM to 1 if it has dropped due previous knock events (assuming its not knocking at low/steady loads if so you have serious knock problems).

If you do 2 or 3 "vishnu reset" runs ie partial light (20% or so) steady throttle runs from 2000-6000rpm or so in 2nd or 3rd it will set your fuel trims and reset your IAM (assuming is not knocking at low/steady loads) if its less than 1. The gear is not really important its the partial steady throttle the longer the run the better. A slight uphill grade can be useful (or you can left foot brake). This works anytime to reset IAM back to 1 (assuming its not knocking at light load) it useful when your chasing knock in an area and want IAM back to 1 without an ECU reset.

[themajesticone]

Originally Posted by steve99

Is this your first tank of E85 ?? as fuel trims are -8 negitive usually happens when residual petrol causes rich running and ecu leans using fuel trims.

Their is also a bit of knock somewhere before log started as IAM starts at 0.85 and is climbing back towards 1.

it might just be fuel trims need a bit more learning and residual petrol causing that bit of knock.

If you log FLKC and Knock Correction (FBKC) instead of vvt intake and exhaust would help to see knock.

and log Commanded AFR and Engine load instead of oil/coolant temp.

try a

Vishnu Reset -Trick
Yes you can google it :-)

Basically it speed's learning of Fuel Trims and will Reset you IAM to 1 if it has dropped due previous knock events (assuming its not knocking at low/steady loads if so you have serious knock problems).

If you do 2 or 3 "vishnu reset" runs ie partial light (20% or so) steady throttle runs from 2000-6000rpm or so in 2nd or 3rd it will set your fuel trims and reset your IAM (assuming is not knocking at low/steady loads) if its less than 1. The gear is not really important its the partial steady throttle the longer the run the better. A slight uphill grade can be useful (or you can left foot brake). This works anytime to reset IAM back to 1 (assuming its not knocking at light load) it useful when your chasing knock in an area and want IAM back to 1 without an ECU reset.

Thank you for sharing the info! Yes this is my first tank back on e85, 10.7 gallons to be exact. To perform the IAM reset can I just do it once my car has warmed up or do I have to perform the 30 second ignition turned to ON trick first?

[steve99]

Originally Posted by themajesticone

Thank you for sharing the info! Yes this is my first tank back on e85, 10.7 gallons to be exact. To perform the IAM reset can I just do it once my car has warmed up or do I have to perform the 30 second ignition turned to ON trick first?

no just drive the car at light throttle through the rpm range as above should do it.